Does FastWindow work offline?

Yes. FastWindow works fully offline; your records live on your device.

Does FastWindow show ads or track me?

No. FastWindow has no ads and no tracking, and it does not require an account.

Does FastWindow run on iPad?

Yes. FastWindow is built for both iPhone and iPad.

FastWindow: Fasting Timer

A clean fasting timer with a live ring, informational stage markers, water and mood notes, and the weekly consistency you can actually see. Private, on your iPhone.

Download on theApp Store

Works offlineiPhone and iPadNo ads, no tracking

Learn moreRead the full guide

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FastWindow is a clean fasting timer built around a live ring you actually want to watch. Pick a window, start, and see exactly how long you have fasted and how long is left.

A journal, not a medical device. FastWindow keeps a private record of your fasts, water, and how you feel, all on your iPhone.

What You Get

A live fasting ring showing time elapsed and time to go against your target window
Informational stage markers as the hours pass, clearly labelled as typical, general timings
Presets for 16:8, 18:6, 20:4, and OMAD, plus fully custom windows
Repeat your last window in a single tap
Water quick-log during a fast, one tap per cup
Hunger and mood notes so you can see how a fast really felt
A full history of finished fasts, each with its real length next to the target, with filter and search
A weekly fasting goal with progress you can watch
A consistency calendar that fills in day by day as you finish fasts
Weekly charts, current and longest streak, your target-met rate, and personal records
Export a summary PDF or a CSV of every fast, to keep or share
Start and end reminders, and an edit-start-time control for when you began earlier or later

Free and Pro

Free includes the full live ring, every preset (16:8, 18:6, 20:4, OMAD), one-tap repeat, water logging, a weekly goal, and your complete history with filter and search. Pro unlocks fully custom windows, hunger and mood notes, and Trends: the consistency calendar, weekly charts, streaks, personal records, and PDF and CSV export.

Private by Design

No account, no cloud, no tracking. Everything you enter stays on your iPhone.

Informational Only

FastWindow is a timer and journal, not medical advice. The stage markers are general, typical timings shown for information only; they do not measure or describe what is happening in your body. Fasting is not right for everyone. Talk with a healthcare professional before you start or change a fasting routine, especially if you are pregnant or breastfeeding, are managing a health condition, take medication, or have a history of disordered eating.

Subscription

FastWindow Pro is available as a monthly or yearly auto-renewing subscription, or a one-time Lifetime unlock. The price and billing period are shown in the app before you buy, in your local currency. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically until cancelled. Manage or cancel anytime in Settings > Apple Account > Subscriptions; cancellation takes effect at the end of the current period. Privacy Policy: https://innovalabworks.com/a/fastwindow/privacy Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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FastWindow: Fasting Timer does one job well, works offline, and keeps your data on this device. There is no cloud sync, no account, and nothing to sign up for.

Who it is for

FastWindow: Fasting Timer is for anyone who wants a dependable way to handle this without a spreadsheet or a complicated setup. It sits in the Health & Fitness category on the App Store.

Private by design

No ads, no trackers, no data harvesting, and no cloud sync. Your entries stay on this device and never pass through our servers. There is a Delete All My Data control, so you stay in charge.

Common questions

What is FastWindow: Fasting Timer?

A clean fasting timer with a live ring, informational stage markers, water and mood notes, and the weekly consistency you can actually see. Private, on your iPhone.

Is FastWindow: Fasting Timer on the App Store?

Yes. It is available now on the App Store.

Does FastWindow: Fasting Timer work offline?

Yes. Everything runs on your device, so it works with no signal.

Does FastWindow: Fasting Timer work on iPad?

Yes. It is a universal app and runs natively on iPhone and iPad.

Does FastWindow: Fasting Timer include in-app purchases?

Some advanced features require an in-app purchase. The App Store shows the current choices, prices, and terms for your storefront before you confirm anything.

Read the FastWindow guide · Contact support · Privacy

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