# Fast Slow vs Intermittent Fasting

The clearest difference is ads: Fast Slow at none against Intermittent Fasting's shown. Fast Slow also leads on monetization model (free vs free with in-app purchases) and ratings volume (39 vs 5). Intermittent Fasting's advantage is update cadence (weekly vs every 2 weeks). On price, rating, review sentiment and in-app purchases 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 Intermittent Fasting sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Fast Slow against 5.0 for Intermittent Fasting. That said, the two scores are not equally well evidenced: Fast Slow has 39 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Fast Slow ships an update every 2 weeks, Intermittent Fasting weekly. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fast Slow | Intermittent Fasting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (39 ratings)](https://appshunter.io/ios/app/fast-slow-fasting-tracker/id6749188352/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/intermittent-fasting-orbit/id6756070517/reviews) |
| Number of ratings | **39** | 5 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 48 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Zan Cerne](https://appshunter.io/developer/1747198932) | [Sofiia Stashkiv](https://appshunter.io/developer/1858287768) |

## 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 |


### Intermittent Fasting

[App page](https://appshunter.io/ios/app/intermittent-fasting-orbit/id6756070517)

This app provides a precise timer and tracker for intermittent fasting windows. It offers live stage insights, gentle reminders, and streak tracking to help users maintain consistency without calorie counting or food logging. Designed for clarity and ease of use, it supports various fasting schedules and works offline.

**Highlights:** Precise fasting timer, Live stage insights, Gentle reminders, Streak tracking, Works offline, Supports various fasting schedules

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Unlimited | $4.99 | per month |
| Yearly Unlimited | $29.99 | per year |
| Lifetime Unlimited | $59.99 | one-time |


## Frequently asked questions

### Is Fast Slow free?

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

### Is Intermittent Fasting free?

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

### Which has better reviews, Fast Slow or Intermittent Fasting?

Fast Slow and Intermittent Fasting are both rated 5.0 out of 5 on the App Store, from 39 and 5 ratings respectively.

### Do Fast Slow or Intermittent Fasting have ads?

Intermittent Fasting shows ads; Fast Slow does not.

### Which is updated more often, Fast Slow or Intermittent Fasting?

Fast Slow ships an update every 2 weeks, and Intermittent Fasting weekly. Most recently, Fast Slow was updated on November 5, 2026 and Intermittent Fasting on October 30, 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.*