# ByteFast vs Simple Fast

The clearest difference is ads: ByteFast at none against Simple Fast's shown. ByteFast also leads on update cadence (every 2 weeks vs every 2 months). Simple Fast's advantage is iOS requirement (15.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

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

ByteFast ships an update every 2 weeks, Simple Fast every 2 months. The most recent releases landed on October 12, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | ByteFast | Simple Fast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 11 MB | 45 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [BYTESEED LLC](https://appshunter.io/developer/1896674402) | [Duc Dang Ngoc](https://appshunter.io/developer/1704135652) |

## 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


### Simple Fast

[App page](https://appshunter.io/ios/app/simple-fast-fasting-tracker/id6774254122)

**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 Simple Fast free?

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

### Do ByteFast or Simple Fast have ads?

Simple Fast shows ads; ByteFast does not.

### Which is updated more often, ByteFast or Simple Fast?

ByteFast ships an update every 2 weeks, and Simple Fast every 2 months. Most recently, ByteFast was updated on October 12, 2026 and Simple Fast on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*