# Fasty vs Fast Slow

The clearest difference is review sentiment: Fast Slow at 100% against Fasty's 8%. Fast Slow also leads on update cadence (every 2 weeks vs every 9 months) and monetization model (free vs free with in-app purchases). Fasty's advantage is ratings volume (1.6K vs 39) and iOS requirement (16.5 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Fasty sells 3 in-app purchases, starting at $9.99 per 7 days and Fast Slow sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fast Slow holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Fasty has 1.6K ratings behind it against 39, so its average is the more settled of the two. Written reviews point the same way: 8% of Fasty's written reviews are positive against 100% of Fast Slow's.

Fasty ships an update every 9 months, Fast Slow every 2 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fasty | Fast Slow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.6K ratings)](https://appshunter.io/ios/app/fasty-intermittent-fasting/id6744280079/reviews) | **[5.0 (39 ratings)](https://appshunter.io/ios/app/fast-slow-fasting-tracker/id6749188352/reviews)** |
| Number of ratings | **1.6K** | 39 |
| Positive reviews | 7.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 23 MB |
| Requires iOS | **16.5** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gabe Rogers](https://appshunter.io/developer/1584630702) | [Zan Cerne](https://appshunter.io/developer/1747198932) |

## What reviewers say

### Fasty

[App page](https://appshunter.io/ios/app/fasty-intermittent-fasting/id6744280079)

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.

**Highlights:** One-tap fasting timer, Multiple fasting programs, Custom fast durations, Weight tracking, BMI tracking, Progress and streak tracking, Ad-free experience

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Monthly | $24.99 | per month |
| Annual | $34.99 | per year |


### Fast Slow

[App page](https://appshunter.io/ios/app/fast-slow-fasting-tracker/id6749188352)

Understand your body's metabolic changes during fasting with a visual timeline. This free app guides you through different fasting zones, from digestion to deep ketosis, and offers customizable schedules and smart notifications. It provides stats, streaks, and widgets for easy progress tracking.

**Highlights:** Fasting timer with visual timeline, 6 customizable fasting schedules, 5 distinct fasting zones explained, Smart notifications for fasting windows, Stats, streaks, and trends tracking, Home and Lock Screen widgets, Siri Shortcuts integration

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Legacy | $1.99 | per 7 days |
| Legacy - Yearly | $12.99 | per year |
| Buy Me a Coffee | $2.99 | one-time |
| You're Amazing | $9.99 | one-time |


## Frequently asked questions

### Is Fasty free?

Fasty is free to download, with in-app purchases available.

### Is Fast Slow free?

Fast Slow is free to download, with in-app purchases available.

### Which has better reviews, Fasty or Fast Slow?

Fast Slow is rated higher. Fasty averages 4.7 out of 5 from 1.6K ratings, while Fast Slow averages 5.0 from 39 ratings.

### Do Fasty or Fast Slow have ads?

Neither Fasty nor Fast Slow shows ads.

### Which is updated more often, Fasty or Fast Slow?

Fasty ships an update every 9 months, and Fast Slow every 2 weeks. Most recently, Fasty was updated on October 28, 2026 and Fast Slow on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*