# SimpleFastingTimer(OneClick) vs Cairn

The clearest difference is in-app purchases: SimpleFastingTimer(OneClick) at none against Cairn's 2. Cairn's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Cairn sells 2 in-app purchases, starting at $4.99 per month. SimpleFastingTimer(OneClick) asks for nothing beyond the download.

## The numbers

| Metric | SimpleFastingTimer(OneClick) | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | — |
| Monetization | Free | — |
| Size | 32 MB | 44 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Goodcode](https://appshunter.io/developer/1588021729) | [Huy Nguyen](https://appshunter.io/developer/1896764157) |

## What reviewers say

### SimpleFastingTimer(OneClick)

[App page](https://appshunter.io/ios/app/simplefastingtimeroneclick/id6448982348)

This app offers a straightforward approach to intermittent fasting, allowing users to easily track their fasting periods with a single tap. It provides a clear interface to monitor progress and manage eating windows.

**Highlights:** One-click fasting start/stop, Fasting period tracking, Eating window monitoring, Simple progress visualization

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

**In-app purchases:** none


### Cairn

[App page](https://appshunter.io/ios/app/cairn-sober-streak-tracker/id6781625086)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn Reflection Monthly | $4.99 | per month |
| Cairn Reflection Annually | $39.99 | per year |


## Frequently asked questions

### Is SimpleFastingTimer(OneClick) free?

SimpleFastingTimer(OneClick) is free to download, with no in-app purchases.

### Is Cairn free?

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

### Do SimpleFastingTimer(OneClick) or Cairn have ads?

Neither SimpleFastingTimer(OneClick) nor Cairn 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.*