Fitbit Open Source Android App
This app is based on the work of Jiska Classen, Matthias Hanreich, Steffen Kreis, Tobias Krichel, Johannes Riedel and Sven Ströher.
Features
- Scan for BLE Fitbit devices
- Authenticate against Fitbit server like the original app
- Obtain authentication credentials from the Fitbit server for authentication replay¹
- Get activity dumps¹ and decrypt them²
- Access live mode¹
- Dump memory including the complete firmware²
- Flash custom firmware³ that modifies step counts, reads out raw accelerometer data, etc.
Workflow
- Use official Fitbit app and associate a tracker you own physically with your user account.
- With a regularly associated tracker you can access all features that require authentication (live mode¹, memory readout²).
- Build any custom firmware using our Nexmon-based project https://github.com/seemoo-lab/fitness-firmware or use one of the pre-compiled images.
Models
- all models including Ionic smart watch
- probably Fitbit Flex, Charge, Charge HR, One with firmware < October 2017 only, ideally buy a new tracker and never update it
- Fitbit Flex only
