FastZen
FastZen iOS
Choose your days and start time. FastZen keeps elapsed and remaining time within sight.
Purchase options and compatibility are detailed in the App Store listing and in the app.
What it does FastZen
Preview your personal schedule before any purchase. With Custom Week, move a start or take a rest day for one date only, without changing the recurring week. Dates and start times follow your local time zone. With a dated exception, reminders cover the next eight weeks and refresh when you open FastZen.
Set your routine’s days and start time, and change them when your schedule changes.
See elapsed and remaining time in the app and on your Lock Screen.
Review your personal history. FastZen is a timer, not medical guidance.
Follow your current fast and organize a week that fits your routine.
Start or end your timer, adjust times and review your history. Rest days belong in your schedule: the plan should fit your life, not the other way around.
The core timer is free. Custom Week is available as a one-time purchase, without a subscription. People who used FastZen before version 1.1.0 keep that access without paying.
This is a tracking tool, not medical advice or a weight-loss promise.
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