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Hold the line.

FastDown is a fasting countdown for iPhone. Pick a window — 12 to 48 hours between meals, or any length you set — and hold the line.

Common questions

Where is my data? On your phone. There is no account and no server; your fasting record never leaves the device.
How do I turn off anonymous usage stats? The switch is on the main screen, under ANONYMOUS USAGE STATS. Off means nothing is sent, at all.
A reminder didn't fire. Check iOS Settings → Notifications → FastDown, and if you use a Focus mode, allow FastDown in it (Settings → Focus → your Focus → Apps).
Can I log a fast I forgot to time? Yes — Record tab → ADD A PAST FAST. A hand-logged fast earns badges and streaks exactly like a timed one.
Why does the timer count up past the end? Reaching term never stops the clock: overtime counts up until you tap finish, and the extra hours count.