# JustFast vs Fasty

The clearest difference is update cadence: Fasty at every 3 days against JustFast's fortnightly. On price, ads, 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.

JustFast ships an update fortnightly, Fasty every 3 days. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | JustFast | Fasty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free | — |
| Size | 20 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) | [长贵 周](https://appshunter.io/developer/6779968395) |

## What reviewers say

### 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


### Fasty

[App page](https://appshunter.io/ios/app/fasty-if-fasting-timer-app/id6779994881)

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

**In-app purchases:** none


## Frequently asked questions

### Is JustFast free?

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

### Is Fasty free?

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

### Do JustFast or Fasty have ads?

Neither JustFast nor Fasty shows ads.

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

JustFast ships an update fortnightly, and Fasty every 3 days. Most recently, JustFast was updated on September 28, 2026 and Fasty on October 2, 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.*