# FastWindow vs Intermittent

The clearest difference is in-app purchases: Intermittent at none against FastWindow's 1. Intermittent also leads on iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. FastWindow sells 1 one-off in-app purchase. Intermittent asks for nothing beyond the download.

## The numbers

| Metric | FastWindow | Intermittent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (46 ratings)](https://appshunter.io/ios/app/intermittent-fasting-tracker/id6767781311/reviews)** |
| Number of ratings | — | **46** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Monetization | — | Free |
| Size | 37 MB | 39 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [PROJECTSNAPLABS LTD](https://appshunter.io/developer/1889904681) | [Rohit Kumar](https://appshunter.io/developer/1896508140) |

## What reviewers say

### FastWindow

[App page](https://appshunter.io/ios/app/fastwindow-fasting-timer/id6764386746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastWindow Pro | $4.99 | one-time |


### 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 FastWindow free?

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

### Is Intermittent free?

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

### Do FastWindow or Intermittent have ads?

Neither FastWindow nor Intermittent shows ads.

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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.*