AllyFast vs Fasty
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.
Fasty
This app offers a straightforward and privacy-focused way to track intermittent fasting. It provides tools for timing fasts, monitoring weight and BMI, and maintaining progress streaks without requiring sign-up or displaying ads.
- One-tap fasting timer
- Multiple fasting programs
- Custom fast durations
- Weight tracking
- BMI tracking
- Progress and streak tracking
- Ad-free experience
Read full descriptionHide full description
Fasty – The Simplest Way to Track Your Fast No ads. No sign up. Just fasting. Fasty is the most minimal, privacy-friendly intermittent fasting tracker on the App Store. Whether you’re just getting started or deep into your fasting journey, Fasty helps you stay consistent—without distractions or data collection. No accounts. No emails. No tracking—except your fasts (and your weight, if you want). What You’ll Get: - One-tap fasting timer - Tons of different fasting programs - Custom Fast Durations - Simple weight tracking - Easy BMI Tracking - Streaks & progress tracking - Clean, distraction-free design - Absolutely no ads Whether you’re doing a 16:8 fast, OMAD, or something custom, Fasty makes it easy to stay on track with your health goals—without giving up your privacy. Fasting doesn’t have to be complicated. Download Fasty and keep it simple. Our app uses the accepted BMI formula of BMI = kg/m2 more info can be found here: https://www.heartfoundation.org.au/bmi-calculator Terms Of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.termsfeed.com/live/05dde8a0-027e-412a-91ba-690f48580523
Screenshots
Verdict
The clearest difference is review sentiment: AllyFast at 100% against Fasty's 8%. AllyFast also leads on in-app purchases (none vs 3) and update cadence (monthly vs every 9 months). Fasty's advantage is price (Free vs $0.99) and ratings volume (1.5K vs 18). 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
Fasty is free to download; AllyFast costs $0.99 up front. Fasty sells 3 in-app purchases, starting at $9.99 per 7 days. AllyFast asks for nothing beyond the download.
AllyFast holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Fasty has 1.5K ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 100% of AllyFast's written reviews are positive against 8% of Fasty's.
AllyFast ships an update monthly, Fasty every 9 months. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.
| Parameter | AllyFast | Fasty |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (18 ratings) — better | 4.7 (1.5K ratings) |
| Positive reviews | 100.0% of reviews — better | 7.7% of reviews |
| Number of ratings | 18 | 1.5K — better |
| Update frequency | Monthly — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.2 | 16.5 — better |
| Further details — not scored | ||
| Size | 2 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Wonseok Lee | Gabe Rogers |
Customer experience
AllyFast
Fasty
In-app purchases
AllyFast
No in-app purchases
Fasty
- Weekly$9.997 Days
- Monthly$24.991 Month
- Annual7 Days trial$34.991 Year
