# Intermittent Fasting vs JustFast

The clearest difference is rating: Intermittent Fasting at 5.0 against JustFast's 4.5. Intermittent Fasting also leads on ratings volume (9 vs 2) and device support (4 vs 2). JustFast's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and update cadence there is nothing between them.

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

Intermittent Fasting holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

Intermittent Fasting ships an update every 2 weeks, JustFast fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Intermittent Fasting | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/intermittent-fasting-justfast/id6752963711/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews) |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 126 MB | 20 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Adrian Cabala](https://appshunter.io/developer/1841708643) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## 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 |


### JustFast

[App page](https://appshunter.io/ios/app/justfast-timer/id6775042519)

This app offers a straightforward intermittent fasting timer. It focuses on tracking your fast with a clear, calm interface, providing insights into metabolic stages without gamification or pressure. It prioritizes privacy with on-device data storage and no accounts.

**Highlights:** One-tap start and stop, Live timer with accurate timekeeping, Metabolic milestone tracking, Plain-language explanations of milestones, Adjustable start/stop times, Ongoing notification for duration, Simple history of past fasts, 18 languages and dark design

**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 JustFast free?

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

### Which has better reviews, Intermittent Fasting or JustFast?

Intermittent Fasting is rated higher. Intermittent Fasting averages 5.0 out of 5 from 9 ratings, while JustFast averages 4.5 from 2 ratings.

### Do Intermittent Fasting or JustFast have ads?

Intermittent Fasting shows ads; JustFast does not.

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

Intermittent Fasting ships an update every 2 weeks, and JustFast fortnightly. Most recently, Intermittent Fasting was updated on October 24, 2026 and JustFast 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.*