# Fasty vs JustFast

The clearest difference is update cadence: JustFast at fortnightly against Fasty's every 16 months. Fasty's advantage is ratings volume (7 vs 1) and iOS requirement (14.0 vs 18.0). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Fasty against 5.0 for JustFast. That said, the two scores are not equally well evidenced: Fasty has 7 ratings behind it against 1, so its average is the more settled of the two.

Fasty ships an update every 16 months, JustFast fortnightly. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fasty | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/fasty-fasting-tracker/id1596329455/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 2 MB | 20 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Forest and the Trees, LLC](https://appshunter.io/developer/1596329457) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### Fasty

[App page](https://appshunter.io/ios/app/fasty-fasting-tracker/id1596329455)

This app helps users track intermittent fasting by monitoring fasting days and eating periods. It supports weight tracking in both pounds and kilograms and does not collect user data.

**Highlights:** Intermittent fasting tracking, Weight tracking, Fasting day monitoring, Eating period logging, Pound and kilogram support, No data collection

**In-app purchases:** none


### 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 Fasty free?

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

### Is JustFast free?

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

### Which has better reviews, Fasty or JustFast?

JustFast is rated higher. Fasty averages 4.9 out of 5 from 7 ratings, while JustFast averages 5.0 from 1 ratings.

### Do Fasty or JustFast have ads?

Neither Fasty nor JustFast shows ads.

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

Fasty ships an update every 16 months, and JustFast fortnightly. Most recently, Fasty was updated on October 1, 2026 and JustFast on October 14, 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.*