# KetOne vs SimpleFast

The clearest difference is in-app purchases: SimpleFast at none against KetOne's 2. KetOne's advantage is iOS requirement (18.2 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. KetOne sells 2 in-app purchases, starting at $19.99 per 3 months. SimpleFast asks for nothing beyond the download.

## The numbers

| Metric | KetOne | SimpleFast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 73 MB | 6 MB |
| Requires iOS | **18.2** | 26.2 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oriana Isabel Leal Ramos](https://appshunter.io/developer/1843461781) | [Khitdhikhun Klinsang](https://appshunter.io/developer/1891241513) |

## What reviewers say

### KetOne

[App page](https://appshunter.io/ios/app/ketone-fasting-tracker-easy/id6753320512)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reset Cycle | $19.99 | per 3 months |
| Mastery Cycle | $44.99 | per year |


### SimpleFast

[App page](https://appshunter.io/ios/app/simplefast-fasting-tracker/id6765591381)

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

**In-app purchases:** none


## Frequently asked questions

### Is KetOne free?

KetOne is free to download, with in-app purchases available.

### Is SimpleFast free?

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

### Do KetOne or SimpleFast have ads?

Neither KetOne nor SimpleFast shows ads.

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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.*