# Fasty vs JustFast

The clearest difference is in-app purchases: JustFast at none against Fasty's 3. JustFast also leads on update cadence (fortnightly vs every 9 months) and rating (5.0 vs 4.7). Fasty's advantage is ratings volume (1.5K vs 1) and iOS requirement (16.5 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Fasty sells 3 in-app purchases, starting at $9.99 per 7 days. JustFast asks for nothing beyond the download.

JustFast holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Fasty has 1.5K ratings behind it against 1, so its average is the more settled of the two.

Fasty ships an update every 9 months, JustFast fortnightly. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fasty | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.5K ratings)](https://appshunter.io/ios/app/fasty-intermittent-fasting/id6744280079/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews)** |
| Number of ratings | **1.5K** | 1 |
| Positive reviews | 7.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 20 MB |
| Requires iOS | **16.5** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gabe Rogers](https://appshunter.io/developer/1584630702) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### Fasty

[App page](https://appshunter.io/ios/app/fasty-intermittent-fasting/id6744280079)

This app offers a straightforward and privacy-focused way to track intermittent fasting. It provides tools for timing fasts, monitoring weight and BMI, and maintaining progress streaks without requiring sign-up or displaying ads.

**Highlights:** One-tap fasting timer, Multiple fasting programs, Custom fast durations, Weight tracking, BMI tracking, Progress and streak tracking, Ad-free experience

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Monthly | $24.99 | per month |
| Annual | $34.99 | 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 Fasty free?

Fasty 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, Fasty or JustFast?

JustFast is rated higher. Fasty averages 4.7 out of 5 from 1.5K 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 9 months, and JustFast fortnightly. Most recently, Fasty was updated on October 20, 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.*