What a workout tracker app needs
- Log sets, reps, and weight fast
- Reusable workout routines
- Rest timer between sets
- Progress charts per exercise
- Workout history calendar
The screens
| Screen | What it does |
|---|---|
| Workouts | Start a routine or browse history |
| Active Workout | Set logging with prefilled previous weights + rest timer |
| Exercise Detail | Progress chart over time |
| Routines | Create and edit routine templates |
| Settings | Units, timers, subscription |
The data model
Exercise: name, muscleGroupRoutine: name, exerciseIdsWorkoutSet: exerciseId, date, weight, reps
The build prompt (copy this)
Paste this into ShipNative and it becomes a working React Native app with these screens, navigable in a live preview, in about two minutes:
“A workout tracker for the gym. Users pick a routine, log sets with weight and reps (prefill last values), and see progress charts per exercise. Screens: Workouts, Active Workout with rest timer, Exercise Detail with chart, Routines editor, Settings. Subscription unlocks unlimited routines.”
Then iterate with small, screen-specific prompts (“make the primary button bigger”, “add an empty state”), preview on your own phone, and export the full Expo project whenever you want. The full method: how to build an app with AI.
How it makes money
Freemium: 2 routines free, unlimited + charts behind a $4–8/mo subscription.
Implementation and the revenue math for every model: how to make money from an app. When you’re ready to ship: App Store and Google Play publishing guides.
Build it now
The prompt above is free to run at shipnative.dev — working workout tracker app on your phone today, full code export, no credit card.