# Intermittent Fasting vs Fast

The clearest difference is in-app purchases: Fast at none against Intermittent Fasting's 4. Fast also leads on ads (none vs shown) and update cadence (every 2 days vs every 2 weeks). Intermittent Fasting's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. Intermittent Fasting sells 4 in-app purchases, starting at $2.99 per month. Fast asks for nothing beyond the download.

Intermittent Fasting ships an update every 2 weeks, Fast every 2 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Intermittent Fasting | Fast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/intermittent-fasting-justfast/id6752963711/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 126 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Adrian Cabala](https://appshunter.io/developer/1841708643) | [Invotek AS](https://appshunter.io/developer/1836667478) |

## What reviewers say

### Intermittent Fasting

[App page](https://appshunter.io/ios/app/intermittent-fasting-justfast/id6752963711)

This app tracks both your fasting periods and your eating windows, offering a unique dual-countdown feature. It visualizes metabolic phases like fat burning and ketosis, supports various fasting methods, and provides insights into your progress. It's designed to be user-friendly and privacy-conscious, working entirely offline.

**Highlights:** Eating window countdown, Fasting phases visualization, Support for multiple fasting methods, Streak tracking with grace periods, Pattern insights, Weight and BMI tracking, Smart notifications, 100% offline functionality

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Just Fast Plus monthly | $2.99 | per month |
| Just Fast Plus | $14.99 | per year |
| Just Fast Plus | $14.99 | per year |
| Just Fast Plus Lifetime | $29.99 | one-time |


### Fast

[App page](https://appshunter.io/ios/app/fast-e-intermittent-fasting/id6759206116)

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

**In-app purchases:** none


## Frequently asked questions

### Is Intermittent Fasting free?

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

### Is Fast free?

Fast is free to download, with no in-app purchases.

### Do Intermittent Fasting or Fast have ads?

Intermittent Fasting shows ads; Fast does not.

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

Intermittent Fasting ships an update every 2 weeks, and Fast every 2 days. Most recently, Intermittent Fasting was updated on October 29, 2026 and Fast on October 25, 2026.

---

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