# FastFlow vs Fasting Window

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

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

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | FastFlow | Fasting Window |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 34 MB | 20 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Caprio Lab](https://appshunter.io/developer/1841174043) | [HeungYeol Kim](https://appshunter.io/developer/1878087341) |

## What reviewers say

### FastFlow

[App page](https://appshunter.io/ios/app/fastflow-fasting-tracker/id6756208094)

This app helps users manage intermittent fasting schedules with a visual timer and customizable patterns. It also allows for weight tracking, meal logging with photos, and smart notifications to build healthy habits.

**Highlights:** Circular fasting timer, Flexible fasting patterns, Weight progress graph, Meal logging with photos, Smart notifications, Cloud data sync

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

**In-app purchases:** none


### Fasting Window

[App page](https://appshunter.io/ios/app/fasting-window-if-timer/id6774622599)

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

**In-app purchases:** none


## Frequently asked questions

### Is FastFlow free?

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

### Is Fasting Window free?

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

### Do FastFlow or Fasting Window have ads?

FastFlow shows ads; Fasting Window does not.

### Which is updated more often, FastFlow or Fasting Window?

FastFlow ships an update every 4 months, and Fasting Window every 4 months. Most recently, FastFlow was updated on October 3, 2026 and Fasting Window on October 13, 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.*