# Cairn vs think

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

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

Cairn ships an update every 10 days, think every 2 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Cairn | think |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/think-e-ink-rss-feed-reader/id6795838000/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 71 MB | 51 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Anurag Nagilla](https://appshunter.io/developer/6792871630) | [Khanh Trinh Le Ba](https://appshunter.io/developer/1724132454) |

## What reviewers say

### Cairn

[App page](https://appshunter.io/ios/app/cairn-ai-archive/id6792871628)

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

**In-app purchases:** none


### think

[App page](https://appshunter.io/ios/app/think-e-ink-rss-feed-reader/id6795838000)

This news app offers a focused reading experience by presenting one story at a time, free from distractions like auto-playing media or infinite scrolling. Users can customize their news sources by selecting topics, publishers, or adding custom RSS feeds, with all data stored locally for privacy.

**Highlights:** One story at a time reading, Customizable publisher selection, Add custom RSS/Atom feeds, Bookmark stories for later, No account or tracking, Offline data storage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| think forever | $9.99 | one-time |


## Frequently asked questions

### Is Cairn free?

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

### Is think free?

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

### Do Cairn or think have ads?

Neither Cairn nor think shows ads.

### Which is updated more often, Cairn or think?

Cairn ships an update every 10 days, and think every 2 weeks. Most recently, Cairn was updated on October 31, 2026 and think on October 31, 2026.

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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.*