Why FastStack?
One-tap fasting
Start, pause, or end a fast in a single tap.
Streaks that stick
Keep momentum with simple streaks and gentle nudges.
Flexible schedules
Common windows (16:8, 18:6) or set your own rhythm.
Clear progress
Lightweight charts to visualize trends over time.
Minimal by design
A calm interface that stays out of your way.
Privacy first
Your data stays on your device unless you export it.