# Window vs JustFast

The clearest difference is in-app purchases: JustFast at none against Window's 1. On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Window against 5.0 for JustFast. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Window ships an update every 9 days, JustFast fortnightly. Both last shipped on September 28, 2026.

## The numbers

| Metric | Window | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/window-fasting-timer/id6757469789/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Free | Free |
| Size | 7 MB | 20 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [发发 道](https://appshunter.io/developer/1812431550) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### Window

[App page](https://appshunter.io/ios/app/window-fasting-timer/id6757469789)

This intermittent fasting timer helps you build healthy eating habits with real-time progress tracking and motivational animations. View your fasting status on the Lock Screen and Dynamic Island without opening the app. Track your history, streaks, and success rate with local data storage and no ads.

**Highlights:** One-tap fasting start, Real-time progress tracking, Dynamic Island & Live Activities integration, Preset and custom fasting durations, Fasting history and statistics, Local data storage

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Window Pro | $0.99 | 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 Window free?

Window 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, Window or JustFast?

Window and JustFast are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Window or JustFast have ads?

Neither Window nor JustFast shows ads.

### Which is updated more often, Window or JustFast?

Window ships an update every 9 days, and JustFast fortnightly. Most recently, Window was updated on September 28, 2026 and JustFast on September 28, 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.*