# Intermittent Fasting vs PerfectFast

The clearest difference is in-app purchases: PerfectFast at none against Intermittent Fasting's 4. PerfectFast also leads on ads (none vs shown). Intermittent Fasting's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.6). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Intermittent Fasting against 5.0 for PerfectFast. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Intermittent Fasting ships an update every 2 weeks, PerfectFast every 9 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Intermittent Fasting | PerfectFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (9 ratings)](https://appshunter.io/ios/app/intermittent-fasting-justfast/id6752963711/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/perfectfast-fasting-timer/id6759067877/reviews) |
| Number of ratings | **9** | 8 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Ad-supported | **Free** |
| Size | 126 MB | 32 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Adrian Cabala](https://appshunter.io/developer/1841708643) | [Idan Lupinsky](https://appshunter.io/developer/1876630037) |

## 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 |


### PerfectFast

[App page](https://appshunter.io/ios/app/perfectfast-fasting-timer/id6759067877)

This app helps you track intermittent and extended fasting periods with a clean, focused interface. It supports various fasting schedules, custom durations, and provides detailed history and statistics to monitor your progress.

**Highlights:** Intermittent and extended fast tracking, Custom fasting schedules, Fasting history and statistics, Reminders and notifications, Apple Watch companion app, Live Activity support

**Features:** macOS Compatibility, Apple Watch app, 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 PerfectFast free?

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

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

Intermittent Fasting and PerfectFast are both rated 5.0 out of 5 on the App Store, from 9 and 8 ratings respectively.

### Do Intermittent Fasting or PerfectFast have ads?

Intermittent Fasting shows ads; PerfectFast does not.

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

Intermittent Fasting ships an update every 2 weeks, and PerfectFast every 9 days. Most recently, Intermittent Fasting was updated on October 24, 2026 and PerfectFast on October 25, 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.*