RepGate
An iOS app that gates distracting apps behind movement - chosen apps stay shielded until you earn time with push-ups, squats or a plank, counted on-device by the camera. One rep buys one minute.
- Type
- Personal Project · Native iOS / On-Device ML
- Year
- 2026
- Role
- Sole developer - a native iOS app with a separate, fully tested logic package.
Re-locks reliably through three independent mechanisms reading one shared expiry, and keeps a UI-free logic package with 62 tests that runs without a simulator.
- On-device pose detection, no network
- Three independent re-lock mechanisms
- 62 logic tests + 37 app tests, CI
The problem
Distracting apps eat the day and screen-time limits are trivial to dismiss - I wanted a blocker you actually have to earn your way past with real movement.
Shield selected apps behind exercise, count reps on-device with the camera, and re-lock reliably once the earned time runs out.
What I did
- Split all logic into a pure-Swift RepGateKit package - rep counting, time ledger, blocking state - testable without a simulator (62 tests).
- Used Vision's DetectHumanBodyPoseRequest for on-device pose detection, with angle and posture checks as anti-cheat so a rep only counts when it's real.
- Wired Screen Time / DeviceActivity / Family Controls for shielding and StoreKit 2 for the paywall, with GitHub Actions CI and swift-format linting.
Outcome
A working app with strict Swift 6 concurrency, 62 kit tests plus 37 app tests, and CI on every push.
Stack
- Swift 6
- SwiftUI
- Vision
- DeviceActivity / Family Controls
- StoreKit 2
- XcodeGen