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Fastline

Lock-screen fasting timer.

Coming to the App Store

iPhone and Apple Watch · iOS 18 or later

Fastline Timer screen: a running 16:8 fast with elapsed time, progress ring and recent fasts.

Start a fast, watch it on the lock screen and in the Dynamic Island, and log it when it ends. Widgets, Apple Watch, no account.

  • One tap to start

    Pick a window, tap Start. The timer runs until you end it: no forms, no quiz.

    Fastline Timer screen: a running 16:8 fast with elapsed time, progress ring and recent fasts.

  • Lives on your lock screen

    A Live Activity counts your fast on the lock screen and in the Dynamic Island, with an End button right there.

    Fastline Live Activity banner: fasting window, progress ring, elapsed time and an End fast button.

  • Widgets

    Home-screen and lock-screen widgets show the elapsed time and your window. Start the next fast from the widget.

  • Apple Watch companion

    Start and end a fast from your wrist. The phone stays the source of truth.

    Fastline on Apple Watch: a running fast with elapsed time and an End button.

  • Stages and history

    Commonly cited milestones as the hours pass, as information, not instruction. Streak, averages and a 14-day chart in History.

    Fastline History screen: streak, average and longest fast, goals hit, and a 14-day chart.

  • Two reminders, both optional

    One when your goal is reached, one when it's time to start. Nothing else.

    Fastline Timer screen with the goal reached: a full green ring and an End fast button.

Privacy

No account, no cloud of ours. Your data stays on your device and in your own iCloud backup.

Pricing

$19.99 a year with a 7-day free trial, or $29.99 once. Prices vary by region.

Fastline is a timer, not medical advice. Stage names are commonly cited milestones, not measurements. Talk to a clinician before fasting if you have a medical condition, are pregnant or breastfeeding, or take medication.