# ByteFast vs JustFast

ByteFast and JustFast are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ByteFast ships an update weekly, JustFast fortnightly. The most recent releases landed on September 26, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | ByteFast | 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 | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | — | Free |
| Size | 10 MB | 20 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BYTESEED LLC](https://appshunter.io/developer/1896674402) | [Vitalii Vyrodov](https://appshunter.io/developer/1588698342) |

## What reviewers say

### ByteFast

[App page](https://appshunter.io/ios/app/bytefast-fasting-tracker-168/id6769618458)

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

**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 ByteFast free?

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

### Is JustFast free?

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

### Do ByteFast or JustFast have ads?

Neither ByteFast nor JustFast shows ads.

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

ByteFast ships an update weekly, and JustFast fortnightly. Most recently, ByteFast was updated on September 26, 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.*