# FastTempo vs JustFast

The clearest difference is rating: JustFast at 5.0 against FastTempo's 1.0. JustFast also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. FastTempo sells 1 in-app purchase, starting at $19.99 per year. JustFast asks for nothing beyond the download.

JustFast holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

FastTempo ships an update every 3 months, JustFast fortnightly. The most recent releases landed on October 7, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | FastTempo | JustFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/fasttempo-fasting-timer/id6757407552/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfast-timer/id6775042519/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 20 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Ford](https://appshunter.io/developer/1853471183) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### FastTempo

[App page](https://appshunter.io/ios/app/fasttempo-fasting-timer/id6757407552)

This app provides a straightforward timer to help users maintain consistent eating and fasting windows. It focuses solely on timing, offering a clean visual display and seamless integration with smartwatches. Features include flexible streak tolerance and gradual fasting adjustments for beginners.

**Highlights:** 24-Hour Visual Timer, Apple Watch Integration, Flexible Streak Tolerance, Gradual Fasting Adjustments, Smart Reminders, Automatic Schedule Following, Fasting Pause Functionality

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastTempo Premium | $19.99 | 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 FastTempo free?

FastTempo 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, FastTempo or JustFast?

JustFast is rated higher. FastTempo averages 1.0 out of 5 from 1 ratings, while JustFast averages 5.0 from 1 ratings.

### Do FastTempo or JustFast have ads?

Neither FastTempo nor JustFast shows ads.

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

FastTempo ships an update every 3 months, and JustFast fortnightly. Most recently, FastTempo was updated on October 7, 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.*