FastHabit Intermittent Fasting vs AllyFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FastHabit Intermittent Fasting
This app helps you establish and maintain intermittent fasting routines. It offers flexible tracking, reminders, and integrates with Apple Health and Apple Watch to monitor your progress and weight.
- Flexible fast length setting
- Daily logging and progress tracking
- Reminders and notifications
- Weight tracking
- Apple HealthKit integration
- Apple Watch support
- Data export
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FastHabit helps you start and stay consistent with Intermittent Fasting. Set your fast length, log daily, and use advanced features like reminders, weight tracking and Health App syncing, Apple Watch integration, calendar views, data export, and multi-day fasting to track your progress and accelerate your results. SIMPLE, FLEXIBLE TRACKING - Choose how many hours you want to fast - Keep your motivation in view- See percent complete, time completed, time remaining, and target end. - Easy editing. Stop, restart, or adjust your fast at any time. SYNC EVERYWHERE - Apple Watch integration: Leave your phone at home and still track your fast. - Save and transfer your fasts to a new device with iCloud syncing - FastHabit also integrates with Apple HealthKit. This lets you sync your logged weight in the app automatically to your HealthKit profile. FastHabit also pulls in updated weight data from HealthKit if enabled, to always keep your weight data in sync across the board. SET REMINDERS AND NOTIFICATIONS - Choose the days and times you want reminders to start fasting - Get a notification when your fast is complete MOTIVATIONAL STATS AND PROGRESS: - 10 day Snapshot with ‘streaks’ to show how many days in a row you’ve fasted and how many days you’ve met your goals – a great way to stay motivated. - Calendar and weekly views with daily details - Weight tracking views with fasting overlay MORE GREAT FEATURES - Apple watch complications - iPhone widget - Getting started guide - Enhanced support for longer, multi-day fasts - Export your data FastHabit has been featured in GQ, the Guardian, and Fast Company. --- FastHabit offers an optional auto-renewing annual Premium Subscription (price varies by territory, may include free trial) located on the Upgrade page. Payments will be charged to your iTunes Account after confirmation. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the subscription period. Account will be charged for renewal within 24 hours prior to the end of the current period. Subscriptions may be managed in your iTunes Account’s Settings after purchasing. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://fasthabit.com/privacy-policy Terms of Service: https://fasthabit.com/terms-of-service
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
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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.
Screenshots
Verdict
The clearest difference is price: FastHabit Intermittent Fasting at Free against AllyFast's $0.99. FastHabit Intermittent Fasting also leads on ratings volume (14K vs 18) and iOS requirement (15.0 vs 18.2). AllyFast's advantage is review sentiment (100% vs 58%) and in-app purchases (none vs 3). On update cadence, 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
FastHabit Intermittent Fasting is free to download; AllyFast costs $0.99 up front. FastHabit Intermittent Fasting sells 2 in-app purchases, starting at $59.99 per year. AllyFast asks for nothing beyond the download.
AllyFast holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: FastHabit Intermittent Fasting has 14K ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 58% of FastHabit Intermittent Fasting's written reviews are positive against 100% of AllyFast's.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.
| Parameter | FastHabit Intermittent Fasting | AllyFast |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.8 (14K ratings) | 5.0 (18 ratings) — better |
| Positive reviews | 57.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 14K — better | 18 |
| Update frequency | Monthly | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 31 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | App Holdings | Wonseok Lee |
Customer experience
FastHabit Intermittent Fasting
AllyFast
Bugs and requests
FastHabit Intermittent Fasting
Reported bugs
3 issues- App freezing or crashing after updates
- Inability to manually add or edit fasts
- Inconsistent tracking of long fasts across days
Requested features
5 requests- Ability to track multiple fasts per day
- Option to set custom fasting duration goals
- More detailed fasting history and analytics
- Improved Apple Watch complications and controls
- Integration with other health/fitness apps
AllyFast
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FastHabit Intermittent Fasting
- FastHabit Premium1 Year trial2 variants$59.991 Year
- Upgrade To Pro$2.99
AllyFast
No in-app purchases
Questions
Is FastHabit Intermittent Fasting free?
Is AllyFast free?
Which has better reviews, FastHabit Intermittent Fasting or AllyFast?
Do FastHabit Intermittent Fasting or AllyFast have ads?
Which is updated more often, FastHabit Intermittent Fasting or AllyFast?
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