# Fasta vs JustFast

The clearest difference is in-app purchases: JustFast at none against Fasta's 2. Fasta's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fasta sells 2 in-app purchases, starting at $7.99 per month. JustFast asks for nothing beyond the download.

Fasta ships an update every 2 weeks, JustFast fortnightly. The most recent releases landed on September 24, 2026 and August 27, 2026 respectively.

## The numbers

| Metric | Fasta | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 74 MB | 20 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [OneCount Pty Ltd](https://appshunter.io/developer/1879196979) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### Fasta

[App page](https://appshunter.io/ios/app/fasta-fasting-timer/id6770219812)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fasta Premium | $7.99 | per month |
| Fasta Premium | $49.99 | per year |


### 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 Fasta free?

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

### Is JustFast free?

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

### Do Fasta or JustFast have ads?

Neither Fasta nor JustFast shows ads.

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

Fasta ships an update every 2 weeks, and JustFast fortnightly. Most recently, Fasta was updated on September 24, 2026 and JustFast on August 27, 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.*