LiftLog

LiftLog is an intuitive, cross-platform gym weight tracking app built with React Native and Expo. It features Material Design 3, AI-powered workout planning, and secure, end-to-end encrypted social feeds. Available on Android and iOS.

• 🗿 Intuitive UI which lets you log your progression, without getting in your way
• Entirely device local workouts, no waiting for sign in or downloads
• 📱 Runs on Android and iOS. Web support was removed in this commit
• 🔒 End-to-end encrypted social feeds (opt-in, privacy-first)
• 🎨 Material Design 3 via React Native Paper
• 🌐 Internationalization with Tolgee/Weblate (10+ languages)
• 🏋️‍♂️ Publish workouts, follow other users, and control your feed privacy
• 🧠 AI planner tailors gym plans to your goals and body
• ⚡ Fast, modern UI with Expo Router and Redux Toolkit

LiftLog uses Weblate for internationalization and translation management. Anyone can create an account and start translating!

Want to help translate? Create an account on Weblate!

1. Node.js (v18+): Download here
2. Expo CLI: npm install -g expo-cli (Guide)
3. Android Studio (for Android) (Setup)
4. Xcode (for iOS, macOS only) (Setup)

cd app
npm install
npm run android   # For Android
npm run ios       # For iOS (macOS only)

See backend/README.md for more information on running the backend.

LiftLog is organized into several projects:

• Main React Native app (Expo)
• Components: components/ (layout, presentation, smart)
• State: store/ (Redux Toolkit)
• Services: services/ (API, business logic)
• Hooks: hooks/ (custom React hooks)
• Translations: i18n/ (Tolgee)
• Navigation: Expo Router

For documentation on running the backend for local development, see the README

• Dotnet WebAPI for feeds, AI plans, and secure data
• End-to-end encrypted feeds (AES)
• Claude integration for workout plans

• Client library for in-app purchases/subscriptions

• Source for liftlog.online and privacy policy

Contributions, issues, and feature requests are welcome! See CONTRIBUTING.md (or open an issue/PR).

AI/LLM-assisted contributions are welcome, but issues and feature requests should be written in your own words - see the AI Usage Policy.

• Plan Files - Documents the .liftlogplan file format, and how to generate plans with an AI for import into the app.
• Feed Process - Documents how the feed and sharing works, especially around e2e encryption.
• Remote Backup - Documents how to connect LiftLog to a remote backup server.
• Plaintext Export - Documents how to export your data as plaintext.
• Workout Worker - Documents the WorkoutWorker, an event based bridge between native and JS which powers the Android persistent notifications.
• Storage Migrations - Documents how on-device data is versioned and migrated, and what to do when changing a stored model.

• Discord
• App Website

Note: LiftLog was rewritten from the ground up in React Native. The previous .NET MAUI Blazor implementation is in the dotnet branch.