Datacoach
An AI coaching companion that turns a smartphone and a Snapchat lens into a personal sports tutor — built in a weekend, Top 10 at Founders Inc, sponsored by the Golden State Warriors.
The problem
Most kids don't have access to professional sports coaching. Pro tools — pose tracking, game film analysis, biomechanics breakdowns — live behind tens of thousands of dollars in equipment and a coach who knows how to read it. Meanwhile, parents at home have a smartphone, a driveway, and a kid who wants to get better.
The gap between "I have a phone in my hand" and "I have actionable feedback" is enormous. We wanted to close it in a weekend.
The approach (the 48‑hour build)
The whole thing was built in plain English over a Founders Inc weekend — no engineering team, no traditional code. The trick was stitching together two consumer technologies most people overlook:
- A Snapchat AR lens that uses the platform's built‑in body tracking to capture pose, form, and movement from a normal phone camera — no special hardware required.
- A conversational bot on top of an LLM that takes the AR lens output and translates it into coach‑style feedback: drills to try, what your shoulder is doing wrong, what to focus on next.
- A glue layer that pipes the two together so a parent can record a single rep and get a paragraph of personalized advice back in seconds.
The bet: AR + LLM is enough to get 80% of the value of a real coach for 0% of the cost. The judges agreed.
The result
- Top 10 finalist at the Founders Inc hackathon out of a stacked field.
- Sponsored by the Golden State Warriors as one of the standout sports‑tech entries of the weekend.
- Published on Devpost with a working demo video that still gets traffic from search.
- Validated the broader vibe‑coding thesis: a non‑engineer with the right prompts can ship a finalist‑grade prototype in a weekend.
Press & coverage
What I'd do next
- Ship a real iOS / Android app with on‑device pose tracking so it works without leaving Snapchat.
- Train the conversational layer on actual coaching transcripts per sport (basketball, soccer, tennis) so the feedback feels less generic.
- Add a parent‑facing weekly progress report — the kind of artifact a school or AAU team would actually pay for.
- Open it up to youth sports leagues as a low‑cost tier so coaches can drop in personalized notes per player without burning their evenings.
Want to talk about building something like this?
I run workshops and one‑on‑one sessions on shipping AI products in a weekend.
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