# Fast Slow vs Hush

The clearest difference is ads: Fast Slow at none against Hush's shown. Fast Slow also leads on monetization model (free vs free with in-app purchases). Hush's advantage is update cadence (every 2 days vs every 2 weeks) and iOS requirement (16.0 vs 18.0). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Fast Slow sells 4 in-app purchases, starting at $1.99 per 7 days and Hush sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Fast Slow ships an update every 2 weeks, Hush every 2 days. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Fast Slow | Hush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (39 ratings)](https://appshunter.io/ios/app/fast-slow-fasting-tracker/id6749188352/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 9 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Zan Cerne](https://appshunter.io/developer/1747198932) | [KUREHO](https://appshunter.io/developer/1884942706) |

## What reviewers say

### 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 |


### Hush

[App page](https://appshunter.io/ios/app/hush-intermittent-fasting/id6774887823)

This app offers a quiet and focused intermittent fasting timer. It provides essential features like a center ring timer, preset fasting schedules, and helpful hints during fasting periods. Users can also utilize a home screen widget for at-a-glance tracking and enjoy a privacy-first approach with on-device data storage.

**Highlights:** Center ring timer, Four classic fasting presets, Hunger-peak hint notifications, Home screen widget, Streak tracking, Privacy-first data storage

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Plus | $11.99 | one-time |


## Frequently asked questions

### Is Fast Slow free?

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

### Is Hush free?

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

### Do Fast Slow or Hush have ads?

Hush shows ads; Fast Slow does not.

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

Fast Slow ships an update every 2 weeks, and Hush every 2 days. Most recently, Fast Slow was updated on October 24, 2026 and Hush on October 13, 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.*