Project showcase
PurePower
PurePower is a privacy-focused cycling power journal for Android and iOS. Pair Bluetooth power meters and heart-rate monitors, see live normalized power and training zones, optionally track GPS, and review ride history stored locally in SQLite. Import and export FIT, GPX, and JSON backups. No cloud account, no ads, no subscription. German and English UI.
Built with
Key Features
- Local-first ride journal — no account, no cloud sync for your rides
- Normalized Power, IF, TSS, FTP estimate, power curve, and customizable live dashboard
- Bluetooth (BLE) power meters and optional heart-rate monitors
- Optional GPS for speed, distance, elevation, and route data
- Ride history with analysis charts, laps, and local SQLite storage
- Import / export FIT, GPX, and PurePower JSON backups
- Free with no ads; optional tip via Ko-fi
- German and English UI — built with Expo, React Native, and TypeScript
Frequently Asked Questions
- Does PurePower require an account?
- No. PurePower is fully usable without sign-up. Your rides and settings stay on your device until you delete them or export a backup.
- Where are my rides stored?
- Locally on your device in SQLite. There is no cloud sync to the developer — export FIT, GPX, or JSON when you want a copy elsewhere.
- Which sensors does PurePower support?
- Bluetooth (BLE) cycling power meters and optional heart-rate monitors. GPS is optional for route, speed, and elevation data.
- Is PurePower free?
- Yes — no ads and no subscription. If the app helps your training, you can leave an optional tip via Ko-fi in the app settings.