Expo provides the fastest path to cross-platform fitness apps with native access to device sensors—accelerometer, gyroscope, pedometer, and health APIs—through a managed JavaScript environment. Expo's SDK includes modules for background location tracking, push notifications, and...
ZTABS builds cross-platform fitness apps with Expo — delivering production-grade solutions backed by 500+ projects and 10+ years of experience. Expo provides the fastest path to cross-platform fitness apps with native access to device sensors—accelerometer, gyroscope, pedometer, and health APIs—through a managed JavaScript environment. Expo's SDK includes modules for background location tracking, push notifications, and camera access that fitness apps depend on. Get a free consultation →
500+
Projects Delivered
4.9/5
Client Rating
10+
Years Experience
Expo is a proven choice for cross-platform fitness apps. Our team has delivered hundreds of cross-platform fitness apps projects with Expo, and the results speak for themselves.
Expo provides the fastest path to cross-platform fitness apps with native access to device sensors—accelerometer, gyroscope, pedometer, and health APIs—through a managed JavaScript environment. Expo's SDK includes modules for background location tracking, push notifications, and camera access that fitness apps depend on. The EAS (Expo Application Services) build and update system enables over-the-air updates for workout content and bug fixes without App Store review delays. Expo's development builds with hot reload dramatically speed up the iteration cycle for complex fitness UIs with animations and real-time data visualization.
Expo SDK provides modules for accelerometer, gyroscope, pedometer, and barometer. HealthKit (iOS) and Health Connect (Android) integration syncs workout data with the device's health ecosystem.
EAS Update pushes new workout programs, exercise libraries, and UI improvements directly to users without App Store review. Critical bug fixes reach users in minutes instead of days.
Expo's TaskManager and Location modules handle background GPS tracking for running and cycling. Background fetch updates workout stats even when the app is minimized.
One React Native codebase deploys to both platforms with Expo handling native module bridging. Platform-specific adjustments use Expo's Platform API for the 5% of cases that need different behavior.
Building cross-platform fitness apps with Expo?
Our team has delivered hundreds of Expo projects. Talk to a senior engineer today.
Schedule a CallUse Expo's expo-task-manager with expo-location for background route tracking, but batch GPS writes to reduce battery impact. Store coordinates locally every 5 seconds and sync to the server in batches every 30 seconds—this reduces network calls by 6x while maintaining smooth route visualization.
Expo has become the go-to choice for cross-platform fitness apps because it balances developer productivity with production performance. The ecosystem maturity means fewer custom solutions and faster time-to-market.
| Layer | Tool |
|---|---|
| Framework | Expo SDK 51+ |
| UI | React Native + Reanimated |
| State | Zustand |
| Backend | Supabase |
| Charts | Victory Native |
| Notifications | Expo Notifications |
An Expo fitness app uses React Native with Reanimated for smooth 60fps workout animations—exercise demonstrations, timer countdowns, and progress ring animations run on the UI thread. Zustand manages local state for active workouts with persistence to AsyncStorage for crash recovery. Supabase handles user authentication, workout data storage, and real-time leaderboard subscriptions via WebSocket channels.
The exercise library stores video demonstrations in Supabase Storage with Expo Video for playback, cached locally for offline access. Sensor modules track step counts via the pedometer, workout intensity via the accelerometer, and outdoor routes via GPS with background location permissions. HealthKit and Health Connect integration writes completed workouts and reads resting heart rate and sleep data for recovery recommendations.
Push notifications via Expo Notifications handle workout reminders with custom scheduling logic. Victory Native renders progress charts—weekly volume, personal records, body metrics—with smooth animated transitions. EAS Update enables weekly content pushes for new workout programs without requiring App Store submissions.
Our senior Expo engineers have delivered 500+ projects. Get a free consultation with a technical architect.