# Rocket Memo vs Cairn

The clearest difference is in-app purchases: Cairn at none against Rocket Memo's 5. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Rocket Memo sells 5 in-app purchases, starting at $0.99 per month. Cairn asks for nothing beyond the download.

Rocket Memo ships an update every 10 days, Cairn every 6 days. The most recent releases landed on September 3, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Rocket Memo | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cairn-markdown-tasks/id6786663000/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 6 days** |
| Monetization | — | Free |
| Size | 6 MB | 9 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yoshinori Kasaya](https://appshunter.io/developer/1460652803) | [Young Hun JEONG](https://appshunter.io/developer/6786662344) |

## What reviewers say

### Rocket Memo

[App page](https://appshunter.io/ios/app/rocket-memo/id1472141702)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Pro Monthly | $0.99 | per month |
| Rocket Pro Yearly | $5.99 | per year |
| Small Coffee | $0.99 | one-time |
| Croissant & Coffee | $3.99 | one-time |
| Cake & Coffee | $9.99 | one-time |


### Cairn

[App page](https://appshunter.io/ios/app/cairn-markdown-tasks/id6786663000)

Manage tasks and notes directly within your existing Markdown files. This app offers focused views, quick capture, and robust task management features, all while keeping your data private and locally stored. It integrates seamlessly with Obsidian and other file sync services.

**Highlights:** Native Markdown task and note management, Works with Obsidian vaults or any folder, Quick capture with date, tag, and priority parsing, Multiple task views (Today, Upcoming, Inbox, Pool), Full support for sub-tasks and recurring tasks, Local reminders and Live Activity integration, Data stays local, no cloud sync required

**In-app purchases:** none


## Frequently asked questions

### Is Rocket Memo free?

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

### Is Cairn free?

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

### Do Rocket Memo or Cairn have ads?

Neither Rocket Memo nor Cairn shows ads.

### Which is updated more often, Rocket Memo or Cairn?

Rocket Memo ships an update every 10 days, and Cairn every 6 days. Most recently, Rocket Memo was updated on September 3, 2026 and Cairn on September 13, 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.*