# ThoughtRecorder vs Cairn

The clearest difference is in-app purchases: ThoughtRecorder at none against Cairn's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cairn sells 1 one-off in-app purchase. ThoughtRecorder asks for nothing beyond the download.

## The numbers

| Metric | ThoughtRecorder | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 23 MB | 35 MB |
| Requires iOS | 26.1 | **26.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [GonzoDocs AS](https://appshunter.io/developer/6797487404) | [Pham Van Hai](https://appshunter.io/developer/6805783484) |

## What reviewers say

### ThoughtRecorder

[App page](https://appshunter.io/ios/app/thoughtrecorder/id6797487401)

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

**In-app purchases:** none


### 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 ThoughtRecorder free?

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

### Is Cairn free?

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

### Do ThoughtRecorder or Cairn have ads?

Neither ThoughtRecorder 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.*