Fast Fast: Fasting Timer

As Is

In-app purchases

About this app

Fast Fast is an intermittent fasting timer built for your wrist. Start a fast with one tap, watch the ring fill, and get a buzz when you hit your goal. It runs entirely on the watch: no phone app, no account, no cloud.

WHAT YOU GET
• One-tap start on the classic 16:8 plan
• A live ring with your elapsed time and the stage your body is in: digesting, insulin drop, fat burning, ketosis, renewal
• Goal alert with haptics, and the countdown right on your watch face via the ongoing activity
• Adjust the start time if you forgot to tap Start after dinner
• Your last 7 fasts and your current streak
• A tile for a one-tap start from the watch face
• Everything backed up with your Google account

GO PRO (one-time purchase, 7-day free trial)
• All plans: 12:12, 14:10, 18:6, 20:4, OMAD, 36h, and any custom length up to 72 hours
• Fast schedule: a daily start time, different on weekends if you like, with a reminder or automatic start, and a "window closing" heads-up
• Eating-window countdown on the hero, the tile, and the complication
• Two watch-face complications: elapsed time and time to goal, ticking live
• Stage alerts you choose, plus halfway and one-hour-to-go nudges
• Full history with average, goal rate, longest fast, and a five-week streak calendar
• Streak freeze: one missed day a week doesn't break your streak
• Weekly insights, a 12-week trend, this month and this year totals
• Mood notes and a heart-rate reading after each fast, with insights on what feels best
• Badges for milestones, from your first fast to 500 hours

DESIGNED FOR THE WATCH
Built with Material 3 for Wear OS: a pure black canvas for AMOLED, big numerals you can read at a glance, one action per screen, crown and bezel support everywhere. Works standalone on Wear OS 3 and later, including Wear OS 6.

A NOTE ON STAGES
Stage timings are typical ranges, not medical advice. They vary with your last meal, activity, and body. Talk to a doctor before fasting if you have a medical condition, are pregnant, or take medication.

What’s new

A cleaner app icon — the ring now ends cleanly instead of trailing two dots.