Fast vs Window
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast
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Fasting Timer is a simple app for tracking fasting time. Use the countdown timer to start fasting and monitor progress. The app also lets you log water intake for proper hydration.\n\nWith history and stats, you can review past fasting sessions and analyze progress. Ideal for those building a fasting habit or focusing on health management.\n\nDesigned with simplicity and intuitive controls, anyone can use it easily. Start fasting today with this app for seamless tracking.
Window
This intermittent fasting timer helps you build healthy eating habits with real-time progress tracking and motivational animations. View your fasting status on the Lock Screen and Dynamic Island without opening the app. Track your history, streaks, and success rate with local data storage and no ads.
- One-tap fasting start
- Real-time progress tracking
- Dynamic Island & Live Activities integration
- Preset and custom fasting durations
- Fasting history and statistics
- Local data storage
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Window is a beautifully designed intermittent fasting timer that helps you build healthy eating habits effortlessly. 【CORE FEATURES】 • One-tap to start fasting with real-time progress tracking • Stunning progress ring animation showing completion percentage • Preset durations: 12/14/16/18/20/24 hours • Custom duration for flexible fasting plans 【DYNAMIC ISLAND & LIVE ACTIVITIES】 • Real-time fasting progress on Lock Screen and Dynamic Island • Check remaining time without opening the app • Beautiful countdown animations to keep you motivated 【HISTORY & STATISTICS】 • Complete fasting history records • Track total fasts, streak days, and average duration • Monitor your success rate and witness your progress 【PRIVACY FIRST】 • All data stored locally on your device • No personal information collected • No ads, no tracking 【ONE-TIME PURCHASE】 • No subscriptions, no hidden fees • Unlock all features with a single purchase • Support indie development Start your fasting journey today. Window is here to help you achieve a healthier lifestyle!
Screenshots
Verdict
The clearest difference is ads: Window at none against Fast's shown. Window also leads on update cadence (every 9 days vs every 12 months). Fast's advantage is iOS requirement (13.0 vs 17.6). On price, 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. Fast sells 2 in-app purchases, starting at $4.99 per month and Window sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Fast ships an update every 12 months, Window every 9 days. The most recent releases landed on September 9, 2026 and June 7, 2026 respectively.
| Parameter | Fast | Window |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 12 months | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 74 MB | 7 MB |
| Age rating | 4+ | 12+ |
| Developer | kota tada | 发发 道 |
In-app purchases
Fast
- Ad-free for 1 month7 Days trial$4.991 Month
- Ad-free for 1 year14 Days trial$49.991 Year
Window
- Window Pro$0.99





