# Fasting Timer vs Cairn

The clearest difference is in-app purchases: Fasting Timer at none against Cairn's 2. Cairn's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.1). On price 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. Fasting Timer asks for nothing beyond the download.

## The numbers

| Metric | Fasting Timer | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | — |
| Monetization | Free | — |
| Size | 34 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

### Fasting Timer

[App page](https://appshunter.io/ios/app/fasting-timer-simple-tracker/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 Fasting Timer free?

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

### Is Cairn free?

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

### Do Fasting Timer or Cairn have ads?

Fasting Timer shows ads; Cairn does not.

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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.*