SetCoach
An original ByronDevLab product.
Your set becomes your coach. Then your clip. Then your crew.
The next generation of fitness doesn't start with another workout plan. It starts with a camera that understands movement.
Put your phone down. Step into frame. Start your set.
No additional hardware. No complicated setup. Just you, your workout, and technology designed to understand what's happening in real time.
SetCoach observes, understands, coaches, captures, and eventually connects.
Fitness Apps Remember. SetCoach Understands.
Most fitness apps plan the session or log it afterwards. The moment that matters is during the set — when technique slips, range of motion shortens, and the tenth rep looks nothing like the first.
That's where traditional tracking stops. That's where SetCoach begins.
We're building a training companion that reads the body in motion and delivers feedback while the workout is happening — not another digital notebook.
A system designed to understand the workout itself.
What We're Building Right Now
Full-body posture scanning and movement tracking — surface-level body mapping that follows how you move through a set, not just a checklist after it.
A library of 5,600+ exercises — the coach layer is built to cover the training floor, not a handful of demo moves.
Music in the ear, coaching in the ear — we're integrating Apple Music, Spotify, and YouTube Music so the session keeps its soundtrack while SetCoach whispers cues: depth, tempo, form — without killing the music.
Clip from the same set — the workout becomes a short, shareable take when you're ready to show progress.
One Camera. An Entire Training Experience.
- See — Full-body posture scan. Landmarks become a live read of how you stand and move.
- Track — Movement tracking across the set: reps, depth, tempo, consistency.
- Coach — Whispered cues while you train — not a report after everything is finished.
- Create — Highlights from the same session for Stories, Reels, and Shorts.
- Connect — Longer-term: shared training energy, community, and meaningful connections.
Platform
We're building on Expo today — a fast mobile trial environment so we can ship, feel, and iterate the coach loop on real phones.
Next: native iOS and Android releases. Same product, store-ready distribution.
Web remains a supporting surface where it helps development and demos. The consumer path is mobile-first.
The Technology Behind the Movement
From camera frames to coaching intelligence.
Stack we're building on:
- Expo + React Native — the mobile product surface
- Node.js — services, tooling, and product infrastructure
- On-device computer vision — body landmarks and posture from the phone camera
- Custom movement engines — our own repetition, phase, depth, tempo, and cue logic on top of pose
Pipeline:
- Vision — landmarks and posture from the camera
- Temporal analysis — how the body changes across the set
- Exercise state — phases and repetition boundaries
- Performance metrics — depth, tempo, consistency
- Feedback — coaching cues, including whispered audio over music
- Session intelligence — structured records from what was actually seen
A fitness app on the surface. A movement intelligence engine underneath.
Beyond the Workout: The SetCoach Ecosystem
Three layers. Intelligence is what we prove first.
- Intelligence — Posture, tracking, coaching. This has to earn a place in the workout.
- Expression — Automatic highlights so progress becomes content.
- Connection — Future directions: Gym Buddy, Gym Radio, and Fit Date. Ambition, not shipping claims.
Turn an individual fitness tool into a connected fitness ecosystem.
Built to Grow Beyond the App
Training → Intelligence → Content → Discovery → Community
A growth hypothesis we intend to test — not a proven engine. Useful enough to return to, visible enough to share, meaningful enough to stay for.
Where We Are Today
SetCoach is in active development under ByronDevLab. We're in the Expo trial phase: posture scanning, movement tracking, a 5,600+ exercise surface, and music integrations (Apple Music, Spotify, YouTube Music) with whispered coaching — then iOS and Android.
No public launch yet. No established user base.
Priorities:
- Nail posture + movement tracking on phone
- Validate with real gym users
- Prove whispered, in-set coaching creates training value
- Ship iOS / Android
- Content loop and commercial path
Technical execution and commercial validation advance together.
Built by ByronDevLab
SetCoach is an original ByronDevLab product — not a commissioned client project.
We're building it because fitness technology can do more than plan and log. It can see the set, coach through the ear, and grow into content and connection.
Independent thinking. Original technology. Long-term ambition.
Building What's Next in Fitness
We're looking to connect with experienced entrepreneurs and early-stage investors who understand what it takes to turn ambitious technology into successful businesses.
Let's build something worth backing.
hello@byrondevlab.com→