AllyFast vs ZenFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AllyFast
This app offers a streamlined fasting timer with a clean, SwiftUI-based interface. It prioritizes user privacy with local data storage and provides science-based insights into fasting stages. Enjoy a clutter-free, ad-free experience with no subscriptions.
- SwiftUI fasting timer
- Local data storage
- No subscriptions or ads
- Fasts up to 72 hours
- Editable fasting history
- Science-based fasting insights
Read full descriptionHide full description
AllyFast is a beautifully crafted intermittent fasting timer built with SwiftUI. Clean, lightweight, and privacy-first. Whether you follow 16:8, 18:6, 20:4, OMAD, or extended fasts, AllyFast keeps your fasting journey simple and focused. Why AllyFast? • No subscriptions. One-time $0.99. Yours forever. • 100% private. All data stays on your device. • No ads, no trackers, no accounts, no clutter. • Ultra lightweight at just 1.7 MB. Key Features • Beautiful fasting timer with smooth SwiftUI animations • Supports intermittent fasting plans: 12:12, 14:10, 16:8, 18:6, 20:4, OMAD • Extended fasts up to 72 hours • Editable fasting history with color-coded goal tracking • Science-based fasting stage insights (fed state, ketosis, autophagy, and more) • Unlimited local import and export of your fasting data • Polished for iOS 26 Liquid Glass • Full Dark Mode support Perfect Privacy Your fasting data never leaves your iPhone. No cloud sync, no servers, no tracking. Just you and your fast. Built for Everyone From beginners exploring their first 16:8 fast to experienced fasters tracking multi-day autophagy windows, AllyFast adapts to your goals without getting in the way. No cloud. No noise. Just fasting.
ZenFast
Read full descriptionHide full description
ZenFast, fasting that adapts to real life, your schedule rules. Whether you're new or experienced, ZenFast's intelligent tracker syncs with YOUR rhythm. ◇ Dynamic Fasting Windows Smart algorithms adjust fasting phases based on actual meal times - no rigid clocks. ◇ Effortless Logging Tap-to-record with 15-min precision + food emojis. Meal tracking made joyful. ◇ Motivation Engine Live progress ring + calendar heatmap + shareable achievement cards. Celebrate every win. 4 science-backed plans, start your 7-day free trial → Find YOUR sustainable fasting rhythm! *Consult a doctor before fasting. Not a medical solution.* Feel free to contact us: Official Website: https://www.beibitech.com Official Email: zenfast@beibitech.com
Screenshots
Verdict
The clearest difference is price: ZenFast at Free against AllyFast's $0.99. ZenFast also leads on iOS requirement (15.1 vs 18.2). AllyFast's advantage is in-app purchases (none vs 2) and chart position (#183 vs unranked). On ads 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
ZenFast is free to download; AllyFast costs $0.99 up front. ZenFast sells 2 in-app purchases, starting at $0.99 per month. AllyFast asks for nothing beyond the download.
| Parameter | AllyFast | ZenFast |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (18 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 18 — better | — |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Best chart rank | #183 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 2 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Wonseok Lee | Beibi Technology Co., Ltd. |
In-app purchases
AllyFast
No in-app purchases
ZenFast
- All Access (1 month)7 Days trial$0.991 Month
- All Access (lifetime)$4.99
