Building in public · Los Angeles & Orange County

The work your
players do,
on a page you can send.

Slingshot is a wearable sensor pod for basketball, worn on the upper arm. It counts jumps and reports how the session split between moving and standing, on one page a trainer can send home. We're building it for the trainers the pro systems left out. We're on the second board design now, and we're in gyms while it gets built.

No software contract, no minimums. The pod is sold outright at $149. The academy signs a data processing agreement covering minors' data.

We drive to gyms across Los Angeles, Orange and San Diego counties. If you run sessions, we want to sit in on one and ask what belongs on the report. team@slingshot-sports.com

Why we're building this

Basketball
This season. One sport, done right
$149
Sold outright, no minimums
Any Gym
Works indoors, no WiFi needed
1
Session Load Score
The Problem

Assessed by hand every few months. Nothing in between.

Catapult Vector and STATSports serve pro and D1 programs. Catapult One reaches youth and high school, but basketball is not among its eleven supported sports. None of them were ever an option for a basketball trainer or an academy operator.

The trainers who do measure run assessments by hand every few months, and between assessments nothing reaches the parent. That gap is what we're building for.

Slingshot is built for the basketball programs Catapult was never going to serve.

The Product

One number.
Every player.
Every session.

One page per athlete, per session, built from what a pod on an upper arm can actually see. Here is what we're designing.

// What we're designing
01

Session Load Score

One composite number per player per session, computed against that athlete's own history and never against the athlete next to them. A composite we are still designing, built from what trainers say they watch for.

02

Weekly Parent Report

A clean weekly summary you can send home. The week's sessions, the jump counts, and a note the trainer writes himself.

03

Jump Count

Times the pod saw the pattern of leaving the floor and landing again. It counts the takeoff. It does not measure how high he got.

04

Overhead Actions

Times the arm went above shoulder height in a throwing or shooting pattern. The pod cannot tell a shot from a pass, so the page does not split them.

05

Effort zones

The pod sorts each second by how hard the arm was accelerating, and the report says how the session split. These bands are the pod's own scale, not a published cut-point. Intensity figures are directional, not clinical.

06

Data Ownership

Export every metric, every session, every athlete to CSV in one click. Your data is yours. No lock-in, no paywall.

// WHAT COMES AFTER

What comes next.

The next version is in design. What goes in it gets decided by the sessions we sit in on. The trainers who host us get a direct line into that decision.

See the roadmap →
Next · First on-body sessions
Then · The public product
What we took off this page

Vertical jump.

This site advertised a vertical jump number until August 2026. It is gone, because we did the arithmetic and it does not work from a sensor on an arm. We count jumps. We do not measure how high they were. The arithmetic is here.

For Academy Operators & Program Directors

Built for the business
behind the training.

If you run a training facility, academy, or program, this makes your athletes' work visible to the people paying for it.

01

What goes home every week.

Every athlete's weekly report goes home. Parents see the work every week, not just at the end of the season.

02

A differentiator no one else ships.

Every academy in SoCal promises personalized training. None of them send week-over-week data home. The question we're asking trainers: what would actually be worth putting in front of a parent every week?

03

No enterprise procurement.

No software contract. No player minimums. No sports science consultant required. The academy signs a data processing agreement covering minors' data.

04

Built by people who came up through sports.

We're three founders putting our own savings into this, not a venture-backed team building from the outside. We know what a trainer running fifteen kids a day actually has time for, because we've been in those gyms. No enterprise bloat.

No software contract, no minimums. The pod is sold outright at $149. The academy signs a data processing agreement covering minors' data.

Session Load Score

One score
per session.

One composite number per session, computed against that athlete's own history and never against the athlete next to them. How the score is calculated is still open. We are working it out by asking trainers what they watch for rather than choosing the inputs ourselves. The full reasoning is here.

Player 04 · Sat Apr 18 Sample data
76/ 100
A composite we are still designing, built from what trainers say they watch for.
Effort zones

Show parents how the session was spent.

The pod sorts each second by how hard the arm was accelerating, and the report says how the session split.

Player 07 · 90 min session Sample data
Rest
11 min
Light
22 min
Moderate
34 min
Hard
16 min
Max
7 min
These bands are the pod's own scale, not a published cut-point. Intensity figures are directional, not clinical.
How this works

Built for the academies
the big systems skip.

Catapult and STATSports sell to pro and D1 programs, on contracts and player minimums. Slingshot is for the private academy neither of them will serve. The pod is sold outright at $149. When there is a board to put in a gym, the trainers we have sat with hear first.

Invite us to a session →
Build Log

Building in public.
From a dorm room.

We're three founders building in the open. The decisions, the dead ends, and what the data actually says.

THE LIST

GET THE FIRST REAL REPORT.

We're in gyms across Los Angeles, Orange and San Diego counties asking trainers what belongs on the report. Leave your email and you get the first one off a real session, the week it exists. Paid private basketball academies and skills trainers with budget authority.

No software contract, no minimums. The pod is sold outright at $149. The academy signs a data processing agreement covering minors' data.

We'll reply with two questions, program type and number of athletes. No spam.

Or just email us: team@slingshot-sports.com