Android
GainBook is free on Google Play. Install it with your usual Google account — no tester signup required.
Get it on Google PlayGainBook
Local-first strength training for iOS and Android.
Log sets, build workout templates, and review your training history — all stored on your device. No account required. No cloud sync. Your data stays yours.
Get GainBook
Available now on Google Play. On iPhone, join the public TestFlight beta while App Store approval is pending.
iPhone
Install the TestFlight app, then open the invite link on your iPhone to join the beta. No account required in GainBook itself — everything stays on your device.
Join on TestFlight