Fasting Timer vs Onefast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fasting Timer
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This app is a clean, focused intermittent fasting timer that shows what is happening inside your body. Pick a fasting protocol, tap Start, and watch the crescent-moon progress ring fill as you move through each metabolic stage in real time. End your fast to bank it, build a daily streak, and see your whole history at a glance. A FASTING TIMER THAT JUST WORKS - One big progress ring with elapsed time, time remaining, and your live metabolic stage - Start and stop with a single tap — the timer survives restarts and stays exact - Hit your goal and keep a daily streak alive, with a small celebration each time - Full history: total fasts, total hours, longest fast, current and longest streak - 100% offline — no account, no sign-up, no backend KNOW YOUR METABOLIC STAGE Watch your body cross each fasting stage as the hours add up: - Fed, Catabolic, Fat-burning, Ketosis, Autophagy - A live timeline with a plain-language summary at every stage, so you always know where you are - Deeper stage insights — the science behind fat-burning, ketosis, and autophagy STAGE AND GOAL ALERTS - Optional reminders nudge you as you enter fat-burning, ketosis, and autophagy - A "fast complete" alert fires the moment you reach your goal - All reminders are local — nothing leaves your phone PROTOCOLS FOR EVERY ROUTINE - 16:8 (Classic) — the gentle daily default - 18:6 (Sculpt) — a tighter eating window - 20:4 (Warrior) — one large meal, a strong autophagy push - 23:1 (OMAD) — One Meal A Day - Custom — set any fasting target from 1 to 72 hours BEAUTIFUL NIGHT THEMES - Night themes to choose from: Moonlit, Eclipse, Aurora, and Dawn this app is a general wellness and habit tool, not medical advice. Talk to a doctor before starting any fasting routine, especially if you are pregnant, breastfeeding, diabetic, or have a medical condition. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kanac.github.io/syanac-legal/
Onefast
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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/
Screenshots
Verdict
The clearest difference is update cadence: Onefast at every 2 days against Fasting Timer's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Fasting Timer sells 3 in-app purchases, starting at $4.99 per month and Onefast sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.
Fasting Timer ships an update every 2 weeks, Onefast every 2 days. The most recent releases landed on October 25, 2026 and October 4, 2026 respectively.
| Parameter | Fasting Timer | Onefast |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 39 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Anthony Chui | Nguyen Dinh Chung |
In-app purchases
Fasting Timer
- Plus Monthly$4.991 Month
- Plus Yearly3 Days trial$24.991 Year
- Plus Lifetime$39.99
Onefast
- Onefast Pro (Yearly)$9.991 Year
- Onefast Pro (Lifetime)$19.99









