# ZenFocus vs Cairn

The clearest difference is iOS requirement: ZenFocus at 15.6 against Cairn's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ZenFocus sells 4 in-app purchases, starting at $1.99 per month and Cairn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ZenFocus | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Size | 62 MB | 35 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [SUHEE BYUN](https://appshunter.io/developer/6775685890) | [Pham Van Hai](https://appshunter.io/developer/6805783484) |

## What reviewers say

### ZenFocus

[App page](https://appshunter.io/ios/app/zenfocus-true-study-time/id6775685888)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 찐공 베이직 | $1.99 | per month |
| 찐공 프리미엄 | $2.99 | per month |
| 찐공 베이직 | $17.99 | per year |
| 찐공 프리미엄 | $29.99 | per year |


### Cairn

[App page](https://appshunter.io/ios/app/cairn-focus-and-study-timer/id6811870112)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn Pro · Lifetime Unlock | $1.99 | one-time |


## Frequently asked questions

### Is ZenFocus free?

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

### Is Cairn free?

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

### Do ZenFocus or Cairn have ads?

Neither ZenFocus 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.*