# PerfectFast vs Intermittent

The clearest difference is ratings volume: Intermittent at 32 against PerfectFast's 2. Intermittent also leads on iOS requirement (13.0 vs 17.6). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for PerfectFast against 5.0 for Intermittent. That said, the two scores are not equally well evidenced: Intermittent has 32 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

PerfectFast ships an update weekly, Intermittent every 8 days. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | PerfectFast | Intermittent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/perfectfast/id6759067877/reviews) | [5.0 (32 ratings)](https://appshunter.io/ios/app/intermittent-fasting-tracker/id6767781311/reviews) |
| Number of ratings | 2 | **32** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Free | Free |
| Size | 25 MB | 39 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Idan Lupinsky](https://appshunter.io/developer/1876630037) | [Rohit Kumar](https://appshunter.io/developer/1896508140) |

## What reviewers say

### PerfectFast

[App page](https://appshunter.io/ios/app/perfectfast/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


### Intermittent

[App page](https://appshunter.io/ios/app/intermittent-fasting-tracker/id6767781311)

This app tracks your fasting progress by showing real-time biological phases like ketosis and autophagy. It provides science-backed explanations for each stage and supports various fasting protocols without requiring an account or subscription.

**Highlights:** Real-time biological phase tracking (Fed, Lipolysis, Ketosis, Autophagy), Support for multiple fasting protocols (12:12 to 72-hour fasts), Free science library with cited primary sources, Adaptive hydration target, Weight and progress tracking with trend analysis, Private sharing circle with applause-only responses, Home screen widget and cross-device sync

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

**In-app purchases:** none


## Frequently asked questions

### Is PerfectFast free?

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

### Is Intermittent free?

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

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

PerfectFast and Intermittent are both rated 5.0 out of 5 on the App Store, from 2 and 32 ratings respectively.

### Do PerfectFast or Intermittent have ads?

Neither PerfectFast nor Intermittent shows ads.

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

PerfectFast ships an update weekly, and Intermittent every 8 days. Most recently, PerfectFast was updated on September 15, 2026 and Intermittent on September 22, 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.*