“We didn't know.”
The most expensive
sentence in youth sports.
Baseball tracks his pitch count. Football tracks nothing. Soccer tracks nothing. Nobody is counting the arm, and the arm is the same arm.
One band. One continuous record. Every rep of every sport, all year.
It goes on the wrist in April and comes off in March. Auto-records to onboard storage. No phones at practice. Charges weekly. Baseball, softball, football, soccer. When the soreness shows up in week three of football, you will be able to look back at what August actually cost him.
You did everything right.
You still didn't know.
You know the drive. Three hours on I-75, tournament bag in the trunk, $400 for the weekend — hotels, entry fees, gas, food court baseball. Your kid has been practicing four nights a week since February. Working harder than you've ever asked.
You watch from the bleachers. They look fine.
In late July: 68 pitches Saturday, felt good, 54 more Sunday. Two weeks later: August flag football. Snaps, drops, 60 throws a practice — same arm, different uniform. The soreness showed up in week three of football. The doctor asked about their schedule and just nodded. The coach called it bad luck.
It wasn't bad luck. They'd been saying their shoulder felt "weird" for two weeks. You gave them ibuprofen and told them to warm up.
You are not a bad parent. You had nothing to look at. Every rep thrown from April through August — gone. No record. No baseline. No way to see the load stacking across two sports with two coaches who had never spoken to each other. You were flying completely blind, and so was everyone else on that field.
The words parents say afterward are always the same: "We didn't know."
That phrase — we didn't know — is the most expensive sentence in youth sports. It follows a lost season. Sometimes it follows surgery. Almost always, it follows a warning that was there in the data and invisible everywhere else.
You are already spending $3,000 a year on club fees, private lessons, and tournament travel. The hitting coach says "trust the process." The speed trainer says she's "making gains."
You have no idea if any of it is actually working. You can't prove progress. You can't see the trend. You're taking everyone's word for it and writing the checks.
We’re spending $3K a year. How do I know it’s working? Looks the same to me.
I ask the coach what they need to work on. I get ‘doing great.’ I have zero data to push back with.
Are they getting better or just getting taller? I genuinely cannot tell.
Single-sport sensors
The bat sensor dies when fall ball ends. The kicker sensor never sees them swing. Their three sports' coaches don't talk to each other. You'd need three products that still can't see across the whole year.
Velocity guns and radar
Peak mph misses the "dead arm" accumulating on the inside. The kid throwing 78 mph with collapsing mechanics — the one with "miles on the tires" — looks identical to the kid who's fresh. The radar won't tell you which is which.
Your kid's self-report
He says he's fine because he wants to play. She hides her pain because she's afraid of losing her spot. Kids at this age are not reliable reporters of what their bodies are actually doing. You already know this.
The only thing that changes "we didn't know" into "we saw it coming" is data that travels with your kid across every sport, every season, every rep — and tells you what to do before their body does. That's the only thing we're building.
Bat sensors die
in October.
We don't.
Every single-sport tracker on the market loses your kid the moment they pick up a different ball. The bat sensor goes in a drawer. The kicker sensor never sees them swing.
We follow them. Same band, same ID, same year-long story. By month three, a coach can say things no other product can say.
Cross-sport coverage is not a feature. It is the entire business. Anyone catching up has to start the year-long calendar over from scratch.
Softball
- · windmill release timing
- · pitch count
- · swing compactness
- · weekly workload
Baseball
- · swing tempo
- · load timing
- · throw count
- · weekly workload
Football
- · snap-and-throw
- · catch impact
- · drop-back tempo
- · session load
Soccer (year-round)
- · kick approach
- · sprint cadence
- · session load
- · leg asymmetry
These insights require a full year of multi-sport data. The first cohort is year one.
"Their baseball swing hasn't lost any tempo since July — football season hasn't dragged it."
"Their throwing arm carried 340 pitches from April to July, then went straight into 60 snaps a practice in August. We flagged it. They're fine."
"Their fall football compactness mirrors the gain made in summer baseball — same body learned both."
"Their weekly load is 22% above their February baseline. Pull back this week or the tournament will pull back for you."
Sense. Score. Signal.
Improve.
One band on the wrist. Four scores against their own baseline. Live feedback in the moment. A weekly arc for the coach. A drive-home summary for you. A Season Card at the end.
The wrist captures every rep.
Wristband on the throwing hand. Ankle strap for kickers and soccer. Auto-records the moment it senses motion. No phone open. No app to launch. No syncing at the end of the night.
Auto-record · 6-hour battery · weekly charge
April becomes the only average that matters.
Mechanics. Power. Consistency. Workload. Each scored 0–100 against your kid's own April baseline. Not against an average that includes some other kid's body.
Self-baseline · 0–100 dashboard · workload zone alongside
The apps signal the right person, fast.
Coach phone flags drift live during practice. Parent phone pushes a PR notification before the kid gets to the car. Kid sees their reveal seconds after taking the band off. Three audiences, three phones, near-real-time.
Coach live · parent push · kid post-session reveal
One practice becomes tomorrow's decision.
Coach gets a flag with a drill. Parent gets a 3-bucket summary on the drive home. Kid earns a level. The system turns one practice into next-practice action. And a season into a Season Card.
Coach actions · parent summary · kid leaderboard
Put the band on your kid before they walk onto the field. That's it. Everything else is automatic.
Strap on the band.
The phone walks them through it.
Every other youth wearable starts with: download the app, pair the device, find a setup PDF, hand it to a parent. Ours starts with the kid putting on a wristband. The setup app voice-prompts them through three minutes of guided baseline reps. The band collects on their wrist. After 15 reps, the system knows their easy, their medium, and their max from rep one.
Without baseline calibration, every coaching score is comparing your kid to someone else's body, a stranger's average. After calibration, every score is graded against their own ceiling. That's the difference between data and coaching.
Welcome, Pruitt.
The setup app knows their name, sport, and position from a 30-second parent setup. The band is on their wrist. Ready in one tap.
Five easy. Five medium. Five max.
The phone voice-prompts the next step. Kid does the reps. The band counts. The phone counter ticks up. No supervision needed.
Pruitt's profile is built.
Every rep from now on grades against their own scale. April Pruitt. May Pruitt. Year-from-now Pruitt.
Three reveals.
Three phones. Three audiences.
The band is purpose-built — a sealed coin sensor in a sport wristband. No screen, no on-board processing, no real-time analytics at the wrist. What it does is collect every rep with research-grade fidelity and stream the data to the apps the second it's in BLE range.
The magic isn't on the wrist — it's at the phone. Three phones, actually. Coach in the cage, parent in the stands, kid in the dugout. Each one gets the moment that matters to them within seconds of the rep.
Lila just hit a season-high 96 Mechanics. Tee work paying off.
Three things: improved · watch · do. Tap to read.
Yellow zone. Easy soccer day Sunday is fine.
All processing happens on the phone or in the cloud — within seconds of BLE handshake. The band's job is to capture honestly. The apps' job is to surface what matters.
Score crossed an all-time high. Kid sees it post-session, parent sees it on the drive home.
Coach phone gets the flag while practice is still happening. Pull the kid for 5.
The kid's phone summary leads with what they crushed. Reinforces the right pattern.
Soft note to parent. "Easy soccer day Sunday is fine." Coach gets the same heads-up.
Band synced. Reps captured. Three-bucket parent recap and full coach session report — both queued.
Dumb sensor. Smart apps.
Forever.
Most wearable companies put their intelligence on the device. Then they're stuck — firmware updates fail, hardware ships once a year, every algorithm tweak needs a recall. We put everything important at the apps. The band you put on your kid's wrist today will get smarter every week — not because we replaced the hardware, but because the apps got smarter and the data was already captured cleanly.
No on-device compute = cheap hardware. Every parent can afford one band per kid.
Battery measured in days, not hours. Charge weekly, never mid-game.
No screen to break, no haptic to fail. Single-purpose collector.
Apps update weekly. Same band today is a smarter band a month from now.
Yes — we considered it. Then dropped it. Adding LED + haptic doubles the bill of materials, halves the battery life, breaks the seal, and locks scoring intelligence into firmware that ships once a year. We chose the architecture that gets cheaper, lighter, and smarter over time — not heavier and more expensive. The band collects. The apps coach. That's the bet, and we're keeping it.
Four numbers.
Every kid. Every sport. Every season.
Mechanics, Power, Consistency, Workload. Each scored 0–100 against your kid's own April baseline. Not against an average. Not against the cohort. Against themselves last month. Coaches see them. Parents see them. Kids chase them.
How repeatable the swing/throw path is rep-to-rep. Pure motion-pattern math.
Burst output relative to their own ceiling. Not mph. Their body's explosiveness.
Variance across reps in the same session. Lower variance, higher score.
How well the score holds session-long. The fatigue-resistance score.
It's a green / yellow / red zone telling parents and coaches when to check in. Higher isn't better. Balanced is better.
Each level is one notch of growth across the four scores. Tier shifts at 25 / 50 / 75 / 100. Can't be bought. Won't reset. Pruitt is Level 47 · Gold tier — 3 more levels to Elite.
Up 12% from your April baseline.
Not vs other kids. Vs you in April.
Score moved to 96 today.
From 89 last week. The trend is the win.
Best session of the season.
Your top number, your scale, your year.
13 videos. 71 cues. 9 metrics.
In one day.
We ingested every top YouTube coach in baseball and softball, extracted their verbatim teaching cues, cross-checked them against 97 real pitches from our cleanest dataset, and shipped two new measurable coaching signals to the detector — every one anchored to a real coach’s real teaching.
Driveline, Tread Athletics, Paul Nyman, BTBY, Dan Blewett, Amanda Scarborough.
6 of the top YouTube coaches in baseball and softball, every one with verified audiences in the hundreds of thousands or millions. Every video ingested, transcribed, and structured into a library nobody else has.
Not paraphrase. Not summary. Word for word.
Every drill name, every correction, every term a top coach gives a mechanic, pulled exactly as said and stored in a structured library the app can pull from when a kid's number moves.
Rich's May 9 session. The cleanest dataset we have.
Found two coaching signals nobody else's wrist sensor measures. Killed a third candidate, early trunk extension, because the data said no. Honest kill is the point.
Up from 5 this morning. 7 shipped. 2 candidate.
Elbow In Plane at Landing and Stop-and-Restart Trough both shipped to the detector today, each anchored to a coach who teaches it on YouTube with their own words.
Where 3+ coaches independently converge on the same cue
RAG-searchable, lives alongside session data
Gyro-trough rewrite: 17/97 → 91/97 reps detected
Driveline · Tread · Nyman · McCreary · Blewett · Scarborough
Single-founder, AI-assisted development cycle. What used to take an academic research lab six months — ingest the coaching literature, cross-reference it against real biomechanics data, validate which signals are detectable from wrist alone — happens in a day. That’s not because corners were cut. It’s because the internal stack is purpose-built for this problem. This is the speed advantage the founding cohort gets, and that no competitor can match without building the same stack from scratch.
Every number above is traceable: 13 video ingest files in learning-repository/business/statterbox/, 71 cues in coaching/cues.json, 18 clusters in coaching/patterns.json, 97-rep cross-check in the May 9 session pipeline. Money 8 (early trunk extension) killed because 97 reps said the signal was not detectable from wrist alone — included here because an honest kill is the same proof of rigor as a ship.
“Anytime you see that ball spinning the other way, that is when you know the kid's fingers are not staying on top of the ball. Many kids don't even know they're doing it.”
Coach McCreary · Baseball By The Yard
A parent cannot see that from the bleachers, and the kid cannot feel it. The band counts it. Fingers on top or underneath at release, every throw, all season, next to his own April baseline.
What the YouTube giants teach.
What one wristband measures.
Nine Money metrics. Six coaches with millions of combined views. Every score in Statterbox traces to a verbatim cue from a real coach who teaches it on YouTube — and the app surfaces that coach's exact words to the kid. Not generic gym-speak. The words the coaches themselves use.
The biggest immediate velocity limiter is the position of the elbow at landing.
The elbow is not in plane with where the trunk is rotating so most of that energy is not actually making its way out through the humerus and ultimately into the ball. Watch the path the elbow has to take — the elbow has to take this scooping path where it goes up and underneath and then gets back up into plane closer to release.
Pendulum throws, lasso drill to fill that arm up and in plane as opposed to down here — and what does it feel like to get it up and actually rotate down from this point and get downhill versus rotating and having the elbow climb? Maybe you have a low elbow at landing. So maybe we need to check scapular upward rotation. Make sure your scap can actually get to that position — or is the lat dragging it down?
What's the value of my M when I come to the stop? Zero. Zero. So I've got nothing to get it to the next stage.
5 STALL reps · all in final quarter of session · fatigue signal in the data
If I go out and I put off the rubber and I stop here and then I start to rotate — guess what: I've lost everything that I tried to create here. If I stop between strides and I stop between the arm and the hip and the shoulder — everything has to restart and that just takes all of the momentum out of the delivery.
Focus style to velocity. Without any pauses or hesitation, just smooth — one complete, one smooth process. The transition goes from the hands dropping to the elbows lifting, separating and then into the throw itself. Connection is important because it drives a whipping arm connection for his momentum — focus on the velocity output, not the movement shape.
Staying on top of the ball
Anytime you see that ball spinning the other way, like a slider or a curve ball, that is when you know the kid's fingers are not staying on top of the ball. That's when a player drops a little bit underneath and the ball instead of getting that good sink and angle on the ball just flattens out and stays pretty much on one plane. Many kids don't even know they're doing it.
The metric IS the drill. The easiest way to figure out if a kid is doing that is his ball will almost come out of his hand and spin like this on its way to the target — almost like a little bit of a curve or a ball that's certainly not spinning like a fastball, which would be more 12 to six. The sensor feedback is the fix McCreary prescribes: external read of spin direction. The kid can't self-diagnose. They need feedback they can see.
Gyro X-axis sign-flip timing relative to release timestamp. BEHIND ≥10ms = clean four-seam. AT ±10ms = cutter action. EARLY ≥10ms = slider spin — fingers came off the side.
"Your fingers stayed on top — clean fastball grip. On 4 reps this session, they came off the side early. That's the slider spin Coach McCreary flags."
Same fingerprint surface works for football QBs (spiral vs. wobble) and softball (wrist-snap confirmation). One metric, three sports.
There really is no such thing as perfect mechanics. Anytime I'm doing a breakdown I'm not comparing these guys to this one gold standard.
Just realizing it's much harder to actually fix the problem than simply identify a problem. I'm not comparing these guys to this one gold standard — what I'm doing is looking through a framework but understanding there's a huge range of variation that occurs within this. There's a time and a place for tinkering with mechanics and there's a time when the mechanics are in a really good spot.
Jacob deGrom — he really just said: "I've been focusing on using my existing patterns and being as smooth as possible." Billy Wagner talked about how hard can I throw this ball with as little effort as possible? Compare the kid to themselves, not to a gold standard. The drift score IS the intervention — it tells you whether today's session moved toward their personal baseline or away from it.
Throw the absolute crap out of the ball.
There is a transformer effect in pure rotation — when one body segment connects with the other, you don't get a whip effect per se, you get a transformation effect. This portion of the trunk is largely due to muscular action picking up each segment at its highest velocity. This is critical to understand.
The main issue, the easiest 10 miles an hour he will ever gain, is from putting on 30 pounds and adding a significant amount of strength. Look at the lifting thresholds — mid-400s deadlift, mid-300s squat, around 100-pound dumbbells in dumbbell bench press. Getting to some of those just baseline strength numbers while putting on about 20–25 pounds — there's a high probability that's going to be the unlock you're looking for.
For youth pitchers, the big thing is simplicity. No extraneous movement.
Keep it simple. A lot of times I see pitchers who have a lot of movement and that is going to throw off my rhythm and my tempo and make my release different every time. No extraneous movement — head and center-of-mass stability is the anchor. Every mechanical flaw in youth pitchers traces to unnecessary movement of the head and center of mass.
Lead with your hip, not your shoulder. Arm's width from a wall or fence, palm flat, arm straight. Lift kick leg, slide laterally — NOT rotating — hold, return. The knee can angle slightly back but the body stays mostly sideways. Two steps: wall-assisted first, then free-standing. Knock your knees from the stretch naturally triggers the hip-lead motion without requiring the player to understand it conceptually.
We don't want to teach young pitchers to throw darts to aim. Those are not good habits. They're not sustainable habits.
There is a time and a place for tinkering with mechanics and there is a time when the mechanics are in a really good spot. There's so much more that goes into performance than just mechanics — conditioning, nutrition recovery including sleep, strength and conditioning. Workload isn't a score to chase. It's a check-in.
Throw the absolute crap out of the ball. When the dial hits amber — easy day before tournament. Red means rest. Built so coaches act, parents don't worry. If velocity concern shows up, route to a mechanical checkpoint. Never tell a young pitcher to aim it or take something off. Accuracy is a downstream outcome of mechanics, not an input.
The elbows are lifting, the elbows are lifting — continuous action, not a discrete event.
Scapular loading begins with handbrake. We're not breaking the hands — what we're doing is we're using the elbows. Once the hands separate the elbows don't drop any further than what you see here. Any pause or hesitation between the hands falling and the elbows lifting kills this loading. The process of handbrake — allowing gravity to work for you, let the hands draw — without any pauses. That's a key element: without any pauses or hesitation.
Without any pauses or hesitation, just smooth — one complete, one smooth process. The transition goes from the hands dropping to the elbows lifting, separating and then into the throw itself. Let the hands fall — don't push them down. Elbows lift at break — hands come apart as a result. No stops. One smooth chain from hands-high to release.
If you can't slow it down, you don't have the body awareness you need to make changes to your arm circle at game speed.
I find that a lot of pitchers can't really go in slow motion. They have to be going at full speed all the time. The slower I move, the more I have to feel my muscles. That's why everybody wants to go at 100% — because they don't have to feel things as much. Staying really relaxed, not tense. A tense arm produces uneven angular velocity and reduced arc radius.
Just a simple relax through arm circles as I get through my pitch — staying really relaxed, not tense. Back up just a few feet in front of the pitching rubber, after spin work. First 10–15 pitches: arm circles at 20–30% intensity, deliberately slow, minimal lower-half engagement. Then add: pushing down with my right foot and getting up on my toe, thinking about my drag, my back knee coming towards my front knee. Still ending with balance, not falling over my front foot.
Anytime you see that ball spinning the other way — that is when you know the kid's fingers are not staying on top of the ball.
Some kids throw what is called a natural slider. When they throw a baseball, their fingers generally come on the side of the ball instead of staying directly behind the baseball. Many kids don't even know they're doing it.
The easiest way to figure out if a kid is doing that is his ball will almost come out of his hand and spin like this on its way to the target — almost like a little bit of a curve or a ball that's certainly not spinning like a fastball, which would be more 12 to six. Roll the session's pronation classes up: fastball day or slider day, at a glance.
The elbows are lifting, the elbows are lifting — continuous action, not a discrete event.
Scapular loading begins with handbrake. Any hesitation between the hands falling and the elbows lifting zeros gravitational momentum. What's the value of my M when I come to the stop? Zero. Zero. So I've got nothing to get it to the next stage.
Without any pauses or hesitation, just smooth — one complete, one smooth process. The transition goes from the hands dropping to the elbows lifting, separating and then into the throw itself. One filter on existing tempo + peak_dps fields surfaces every rep where the kid paused mid-delivery. Zero new code.
We don't want to teach young pitchers to throw darts to aim. Those are not good habits. They're not sustainable habits.
Aiming produces neither accuracy nor arm health — it creates muscle-memory for a diminished, tense motion. Coaching feedback should never suggest 'aim it' or 'take something off.' If a kid is missing the zone, the prompt should be about a mechanical checkpoint, not about intent.
Throw the absolute crap out of the ball. Focus style to velocity — direct all athletic focus toward velocity output, not movement shape. We can already see when they took something off. The rep is flagged. The fix is one cue: stop aiming, let the mechanics do the work.
9 metrics. 6 coaches. 71 verbatim cues. One wristband.
Every score in Statterbox traces to a real coach who teaches it on YouTube — and we're aligned with their teaching, not against it. When a kid sees a coaching cue in the app, they're reading the same words Brewster uses with his college pitchers, the same words McCreary uses in his youth clinics, the same words Scarborough teaches to competitive softball programs. The wristband measures what the coaches already see. The app says what the coaches already say.
independently name Elbow In Plane as the biggest velocity limiter
converge on max-intent throwing — none say aim, all say throw hard
Money 7 momentum trough found clean in 91 of 97 real pitching reps
We don't sell a band.
Their season ends with proof they earned.
Every kid in the cohort, end of season, gets a verified digital athletic card. Real stats: repeatability, compactness, total reps, how they grew against their own April baseline. Designed to be screenshotted. Designed to be posted. Designed to be the kid's first real piece of athletic identity.
The wearable is the data-collection layer. The Season Card is the artifact parents share. Every shared card is a free customer for the next cohort.
Posts Lila's Season Card to Instagram on the last Saturday of the season.
Real number. Beautifully designed. Tagged with the year. Their kid, verified.
Sees it scrolling on Sunday morning. Comments: "What is this???"
Their kid plays travel baseball too. They've never had anything like this.
Three texts and one DM later, that family signs up.
One posted Season Card makes another parent ask where it came from. The band feeds the next card.
Auto-generated weekly scorecards.
A small Season Card every week, for 52 weeks.
The week's average across Mechanics, Power, Consistency, Endurance.
The single biggest jump, what to celebrate Sunday night.
What the coach builds drills around for the coming week.
Auto-routed to coach + parent every Sunday at 8 PM. Shareable. Stackable. The 52-week collection becomes the Season Card at year's end.
A band is a band. Your kid's first real verified Season Card every year — that's a tradition you start now and keep until they age out.
Every early-cohort card is serial-numbered. The first kids ever to have one. Not a marketing gimmick — an actual collectible artifact tied to the product's origin.
Coaches got real-time alerts. Parents got drive-home pushes. Kids got leaderboards. The card is what the season builds toward. And the next cohort is what the card builds toward.
What we measure.
What we don't.
Every wearable on the market makes claims it can't back up. We won't. Here is the line — drawn before we ship a single band — between what the sensor is actually capable of and what it is not.
- ✓Motion patterns
How the wrist moves through a rep. Loading phase, peak rotation, deceleration shape, rep-to-rep similarity.
- ✓Self-baseline trends
Your kid's April pattern vs their May pattern. The trend is the signal — not any single rep.
- ✓Workload counts
Total throws, swings, kicks across sessions and seasons. The cumulative volume that matters for safety.
- ✓Cadence + consistency
Inter-event timing, variance across reps, session-end fade. The shape of practice, not the score.
- ✗Exact pitch velocity (mph)
We can't measure ball speed from the wrist. Radar measures ball speed. We measure arm motion.
- ✗Bat exit velocity
The bat moves; we're on the wrist. HitTrax in the cage measures bat speed. We don't.
- ✗Joint angles or biomechanics
We don't reconstruct the body. No knee flex, no hip-shoulder separation, no kinetic chain claims.
- ✗Injury risk scores
A single-wrist sensor cannot quantify joint torque. We surface workload zones. A doctor diagnoses injury.
We grade motion. We don't claim radar-grade velocity.
Your kid is compared to their own April — not someone else's average.
One bad swing doesn't change anything. Three weeks of slipping does.
Honest data is the only data Aaron and Emily wanted to coach with. So that's the only data we collect. If we can't measure it cleanly, we don't claim it.
The market just consolidated
around the swing.
We're building something else.
In May 2026, WIN Reality acquired Blast Motion — combining VR batting training with 500M+ swing records into a single premium hitting bundle. It's a meaningful deal. It validates that parents will pay real money for youth sports sensor data. What it also clarifies: the market's best products go very deep on one motion, for one sport, in one setting. Statterbox is a different bet, one kid, every sport, every season.
| Dimension | Hitting specialist WIN Reality + Blast Motion | Throwing specialist PULSE / Motus throwSleeve | General wearable Apple Watch / WHOOP | Multi-sport platform Statterbox |
|---|---|---|---|---|
| Sports covered | Baseball / softball hitting | Baseball / softball pitching | All (fitness-level tracking) | Baseball · Softball · Football · Soccer (V0) |
| What it measures | Bat speed, swing path, attack angle, time-to-contact | Arm slot, arm speed, elbow stress (acute load) | HR, steps, sleep, generic activity. Not mechanics | 9 Money tiers: pronation timing, mechanics, power, consistency, workload, elbow plane, momentum continuity |
| Where it lives | Batting cage, gym, indoors | Bullpen, field practice | Everywhere — wrist 24/7 | Every practice · every field · every season |
| Multi-sport · one kid | — | — | Partial | ✓ |
| Cross-season record | — | — | Partial | ✓ |
| Cost · year 1 | ~$150–200 (sensor) · $1,000+ (VR bundle) | ~$200–300/year | $200–500 hardware · up to $30/mo (WHOOP) | One band, every sport, pricing at launch |
| Best for | Dedicated hitters who want cage-proven swing data | Serious pitchers managing arm load and injury risk | Overall fitness awareness — not sport-specific coaching | Multi-sport kids and the parents tracking their whole development arc |
| In a line | “500M swing records on bats. Deep on one motion.” | “Built for pitchers managing arm load. One sport, one motion.” | “Tracks the kid's pulse. Doesn't know they're throwing.” | “Every motion the kid makes on every field they play on.” |
“500M swing records on bats. Deep on one motion.”
“Built for pitchers managing arm load. One sport, one motion.”
“Tracks the kid's pulse. Doesn't know they're throwing.”
“Every motion the kid makes on every field they play on.”
Single-motion sensors and VR cages answer one question well: how good is the swing right now? Statterbox answers a different question: who is this kid becoming as an athlete, across everything they do, over years? Both are real questions. They serve different parents. A family with a single-sport travel commitment and a cage subscription already has a great option. A family with a kid who plays baseball in spring, football in fall, and soccer year-round. Following that kid across all of it: that's who we're for.
Questions.
Answered.
What ages is this designed for?
The developmental window we're targeting is ages 7–14 — the years when athletic motor patterns form. If your kid is 8 and plays rec baseball, the band fits and the data is useful. If they're 14 and multi-sport, the cross-season longitudinal story is already building. The early cohort is focused on youth through early high school.
My kid plays baseball AND soccer. Do they need two different bands?
One band. The same band that tracks their baseball throwing arm in April sits on the kicking-leg ankle strap in September for soccer. The app knows which sport they're in based on the mounting point selected at the start of a session. One device, one profile, one year-long story.
Their travel baseball coach and school team coach have never spoken. Can both see the data?
Yes, and that's the whole point. Your kid's throwing arm doesn't care which jersey they're wearing. Both coaches see the same cumulative pitch count, the same workload number, the same loading trends. When the travel coach knows the school season just ended with 68 pitches on Saturday, August conditioning goes differently. The band is the only thing in the system that sees both.
Will it actually get in the way? Will they wear it?
The band sits on the throwing-hand wrist — above the glove line for fielding, above the grip line for batting. For kickers and soccer players it mounts on the ankle. We designed it to be forgotten between reps. The V0 cohort is the compliance test. Our thesis: the leaderboard makes them want it on. Compliance follows motivation.
What will the subscription cost?
Not locked in yet — and that's honest. The early cohort is how we calibrate what the data is worth to real families. Early members lock the lowest price we will ever charge, for the life of the product. The cohort gets a window to tell us what you'd pay to keep it.
We have two kids in two different sports. Do we need two bands?
Yes, one band per kid. Each band belongs to one athlete profile — that's how the individual baseline and the cross-sport longitudinal story get built. The parent app shows both kids on the same dashboard. You manage two profiles from one screen.
What if my kid quits one sport mid-season?
Nothing breaks. The band keeps tracking whatever sports they're still playing. The data from the sport they left stays in the historical record — which is actually valuable for cross-season comparison when they pick it back up next year. The profile is cumulative.
Is this just for throwing sports, or does it track kickers and soccer too?
Both wrist and ankle placement are in the V0 launch. Football kickers and punters wear the band on the kicking-leg ankle. Soccer players do the same. The IMU captures kick approach tempo and follow-through signature distinctly from throwing mechanics — the classifier knows the difference. The Specifics section earlier on this page has the position-by-position breakdown.
Is it waterproof?
Splash + sweat proof. Rated for practice, games, rain delays, and a full summer of softball without an issue. Not rated for swimming pools — take it off before they jump in. We optimize for the field, not the pool.
What if it just breaks on its own?
Hardware defects (battery, sensor, button) — we replace it free. We're shipping a piece of equipment, not a phone — if our band fails on its own, that's our problem. If a kid threw it across the dugout, that's the lost-band policy. Both paths get you a working band; the only difference is who's responsible.
Does the band give my kid feedback while they're playing?
The band is a sealed coin sensor — no screen, no scoring LED, no haptic feedback. It's a purpose-built collector. All scoring and feedback live at the apps. The coach's phone (in their pocket) gets a live drift flag if BLE-connected during practice. The parent's phone gets a PR push as the band syncs. The kid sees their reveal on their phone seconds after taking the band off. We're not putting compute on the band. Ever. The apps stay the smart layer so they can update weekly — instead of the hardware shipping a firmware fix once a year. Cheap band, smart apps, indefinite product velocity.
What does "check in" mean instead of "at risk"?
Word choice. We chose softer language on purpose. "Yellow zone — check in" is what a coach can do. "At risk" is what a parent panics about. The data doesn't change. The framing does. Coaches deserve actionable guidance; parents don't deserve to be scared by a yellow bar on a chart.
Can the app know if it's practice, a private lesson, or free training?
Yes — session type is selected at the start of every session: practice, private lesson, clinic, or free training. The distinction matters for workload tracking. A private lesson is high-intensity, coach-directed, often shorter in reps but higher in quality focus. A free training session is self-paced, higher rep volume, lower intensity. The band captures the same mechanics data either way, but the context tag changes how we frame the workload number and what we compare it against. A 50-pitch private lesson isn't the same load as a 50-pitch scrimmage.