Onefast: Fasting Timer

Intermittent 16:8 tracker

Only for iPhone

Free · In-App Purchases

iPhone

A fasting timer that stays out of your way. One tap to start, your lock screen shows the rest, and no ad ever gets between you and the button. A fasting timer that does one thing well. Pick a plan, tap Start, and Onefast counts. The time left is on your lock screen and in the Dynamic Island, so you never open the app just to look. When the goal is reached it tells you once, then keeps counting, up to seven days. ONE TAP No sign-up, no questions, no tour. The first screen is the plan picker with 16:8 already selected; the second is the timer. That is the whole setup. ALWAYS RIGHT The timer is a clock, not a counter. Force-quit the app, restart the phone, change time zone — it comes back showing the true elapsed time, to the second. The widget, the Live Activity and the app all read the same moment. YOURS TO EDIT Forgot to tap End? Fix the time afterwards. Add a fast you did last week. Overlaps are named in words, not blocked silently. Fasts longer than 24 hours are allowed — Onefast asks once whether you meant it, then never again. QUIET WHEN YOU WANT Three switches: Live Activity with Dynamic Island, the lock screen widget, and the home screen widget. Notifications turn on and off one kind at a time, and the mid-fast ones start off. PLANS 12:12, 14:10, 16:8, 18:6, 20:4 and one meal a day are built in. Up to five named custom plans and a weekly schedule with Pro. NO ADS. EVER. Not on the free tier, not after you buy. Onefast has no server, no account and no analytics. Your history lives on your iPhone and, if you turn it on, in your own private iCloud. ONEFAST PRO Unlimited history (free keeps the last 30 days), 30-day and all-time stats with charts, month and year summaries, insights from your own record, milestones you can share, a weekly schedule with rest days, up to five named custom plans, two-way weight sync with Apple Health, a weight goal line on your chart, ten ring colours and app icons or a colour of your own, a medium calendar widget, and CSV export. Two prices, one name: a yearly subscription that auto-renews until cancelled, or a single lifetime purchase. No trial. The price is on screen before you tap anything. Everything that makes the timer usable — lock screen, notifications, backup, editing — stays free with or without Pro. Onefast is a timer. It gives no medical or dietary advice; talk to a professional before changing how you eat. Available in English, 日本語, 한국어, 繁體中文, Italiano, Nederlands, Deutsch, Français, Español, Português (Brasil), العربية, Türkçe and Tiếng Việt. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://primetruthteam.github.io/onefast/privacy/

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

One icon, one app. Onefast now keeps a single app icon. Choosing a ring colour still changes the timer and the widget, but it no longer swaps the icon on your Home Screen — and if you had picked a different one, it goes back to the original.

Version 1.0.1

The developer, Nguyen Dinh Chung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Size
    4.6 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    Languages
    English and 12 more
    • English, Arabic, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Spanish, Traditional Chinese, Turkish, Vietnamese
    Age Rating
    4+
    In-App Purchases
    Yes
    • Onefast Pro (Lifetime) 22,99 €
    • Onefast Pro (Yearly) 9,99 €
    • Learn More
    Provider
    Nguyen Dinh Chung
    • Nguyen Dinh Chung has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
    • Address
      P1136 HH3A Linh Dam
      Hoang Liet
      Hoang Mai
      Ha noi
      Ha noi 100000
      Vietnam
    • Phone Number
      +84 908881981
    • Email
      zenDesign219@gmail.com
    Copyright
    © 2026 PrimeTruth Team
  • Developer Website
  • Privacy Policy

    • More by Nguyen Dinh Chung

    You Might Also Like