FastZen: Private Fast Timer

Start a 16:8 or custom fast in seconds, keep it on your Lock Screen, and build a private weekly routine—free, with no account, ads, server sync, or paywall.

FastZen is a free, private fasting timer with no account, ads, server sync, or paywall. Start in seconds, follow your fast on the Lock Screen, shape a weekly routine, and keep your history on device.

START FASTING IN ONE TAP Choose 16:8, 18:6, 20:4, OMAD, or a custom duration. Start, stop, or cancel a fast without account setup or extra clutter.

PLAN YOUR WEEK Choose fasting days and a start time. Optional local reminders help you follow your routine without sending personal data to a server.

FOLLOW YOUR FAST FROM THE LOCK SCREEN Live Activities keep your active fast visible on the Lock Screen and Dynamic Island, with remaining time, progress, and your current fasting zone.

SEE YOUR PROGRESS Follow elapsed time, remaining time, target duration, and your current fasting zone from a clean visual timeline.

BUILD CONSISTENCY Review completed fasts, completion percentages, total fasting time, and your current streak.

STAY PRIVATE FastZen does not require an account, server sync, or external analytics. Your fasting data stays on your device.

FastZen is designed for people who want a simple, private, and visually calm way to make intermittent fasting easier to follow.