Mobile template
Mobile Fitness Tracker template
A native iOS and Android fitness app with workout logging, progress charts, goal tracking, and exercise library. Built with React Native for true native performance.
What's included
What gets generated
This is generated as a React Native app rather than a web app, because a fitness tracker that cannot run offline in a gym basement is not useful. It ships to both stores. If you want HealthKit or an Apple Watch companion, that is the point at which the native Swift path is worth taking.
The data model
- users with profile, goals and unit preference (kg or lb changes every screen)
- workouts — a session with a date, duration and notes
- exercises and sets — the reps, weight and rest that make a workout, kept separate so exercise history survives editing a workout
- personal_records — derived on write rather than computed on read, because the chart is the app
- streaks — the retention mechanic, so it needs to be correct across time zones
The screens
- Today: log a workout, with the last session pre-filled as the starting point
- Exercise library with search and per-exercise history
- Progress charts by exercise, by muscle group and by volume over time
- Personal records with the date and the workout each came from
- Profile, goals and unit settings
All of it is generated as source code — React or React Native, Python and SQL — in a repository, with migrations, so the schema above is a starting point you can change rather than a fixed structure you have to work around.
How to use this template
Start from this prompt
The Mobile Fitness Tracker prompt below is the starting point — edit it first if any of "What to change first" applies to you.
Generate the whole stack
Appifex writes the React Native and Expo pieces together with the database and the deploy, not just the interface.
Ship it
Your app is deployed and running, and the repository is in your GitHub account.
What to change first
The exercise library. It ships with a general set; if you are building for a specific discipline, name it in the prompt and the seed data, the units and the progress charts all change together. Retrofitting units after people have logged workouts means a data migration.
What this template does not include
No wearable integration — HealthKit and Google Fit are not wired up, and both need entitlements you have to request from Apple and Google yourself. No social features, and no video, which is the heaviest thing you could add later.
Ask for any of it in the same prompt — the template is a starting point, not a fixed product.
Sample prompt
"Build a native mobile fitness tracker app with workout logging, progress charts, goal setting, and an exercise library with illustrations"
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About the Mobile Fitness Tracker template
What does the Mobile Fitness Tracker template include?
A native iOS and Android fitness app with workout logging, progress charts, goal tracking, and exercise library. Built with React Native for true native performance. It is generated as a complete project rather than a starting skeleton: workout logging, progress charts, goal tracking, exercise library, and more. The stack is React Native, Expo, FastAPI and PostgreSQL, and the whole thing lands in a GitHub repository you own.
Can I change the Mobile Fitness Tracker template after generating it?
Yes, in two ways. You can describe the change in plain language and Appifex regenerates the relevant code, or you can open the repository and edit it directly — it is ordinary React Native, Expo, FastAPI and PostgreSQL with no proprietary runtime or shim to work around. Most people start with the template and diverge from it immediately.
Does the Mobile Fitness Tracker template work on iOS and Android?
Yes. It is generated as React Native through Expo, so a single codebase produces both the iOS and Android apps, with cloud builds and guided store submission.