Train, eat and breathe better — without an account.
Tangent is a fitness and wellness app for Android. Guided workout challenges, a 3D-animated exercise library, a written guide to 500 exercises, food and water logging, fasting and breathing timers, and progress tracking — all of it working with no connection, no sign-up and no data leaving your phone.
Built to work offline
Tangent does not request the Android internet permission. The app has no networking code and no network libraries compiled into it, so it cannot open a connection, upload your records or contact an analytics service — not by policy, but because the capability is not in the build. Everything you enter stays in the app's private storage on your device.
No account, ever
There is no sign-up, no email address and no profile on a server. Open the app and start. An optional PIN and fingerprint lock is available, and it is checked on your device.
No analytics or ads
No advertising SDK, no analytics SDK, no crash-reporting service. If the app crashes it writes a report to a local file and shows it to you on the next launch, so you can send it if you want to.
Three permissions
Notifications for your own reminders, biometrics for the optional app lock, and vibration for haptics — which you can switch off. That is the whole list.
What's inside
Workout challenges
Day-by-day plans with a warm-up, training and cool-down, progress per day, and a player that walks you through each exercise.
3D exercise library
161 exercises demonstrated by 160 packaged 3D animation clips, rendered on your device. The models ship inside the app; nothing streams.
Exercise guide
500 exercises in writing across eight body areas — setup, form cues, breathing, sets and reps, safety notes, and easier and harder variations.
Nutrition & water
A food log with macros over a built-in 47-food catalogue, custom foods you save yourself, and a daily water tracker. No barcode scanning and no photo recognition — both need a server.
Fasting & breathing
A fasting timer with local reminders, plus guided breathing sessions with optional spoken coaching through your device's own text-to-speech.
Progress you own
Streaks, session history, body metrics and badges. Export a report as PDF or text and share it wherever you choose — the app never sends it anywhere on its own.
Availability
Tangent is in closed testing on Google Play and is not yet publicly released. If you would like to take part, email solid.tv.100@gmail.com from the Google account you use on your Android device and you will be sent a tester invitation.
The app runs on Android 7.0 (API level 24) and newer. Interface text is available in 11 languages; English and Bengali are complete and the others fall back to English where a phrase has not been translated yet.
Tangent is not a medical device. It does not diagnose, treat, cure or prevent any condition, and nothing in it is medical advice. Please read the Health & Fitness Disclaimer before you start exercising.