Fastinja
The simplest way to track your fasts, water intake, and weight.
No accounts • No ads • No subscription • No notifications • No nonsense.
Experience Fastinja
Everything you need, nothing you don't.
Tap a feature to dive into the details.
Precision Timing
Our beautiful circular timer gives you a high-resolution view of your fast. Track elapsed time, goal progress, and even see your water and mood logs directly on the clock ring.
Tap to flip back
Your Journey, Visualized
Browse through every fast you've ever completed. See at a glance which goals you met and where you pushed your limits. Drill down into specific days to see detailed logs of your intake and mood.
Tap to flip back
Drink Better
Customize your drink types and sizes. Whether it's pure water, black coffee, or herbal tea, Fastinja helps you stay on top of your hydration goals without breaking your fast.
Tap to flip back
Body Transformation
Log your weight in kg or lbs and see the trends over weeks, months, or years. Our beautiful charts help you stay motivated by focusing on the long-term progress, not just daily fluctuations.
Tap to flip back
Mind & Body
Fasting isn't just about the body. Track how you feel throughout your fast. Identify patterns in your mood and energy levels to find the fasting window that works best for your mental clarity.
Tap to flip back
Your Data, Safe
Export your entire history to a JSON file for backup or analysis. Move your data between devices with ease. Want to see how the app looks with years of data? Use our clash-detecting Demo seeder.
Tap to flip backYour data is yours.
Fastinja is built with privacy at its core. We don't have servers, we don't track you, and we don't sell your data. Everything stays right on your device.