# Plainsight vs Cairn

The clearest difference is in-app purchases: Cairn at none against Plainsight's 1. Cairn also leads on update cadence (every 6 days vs every 2 weeks). Plainsight's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

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

Plainsight ships an update every 2 weeks, Cairn every 6 days. The most recent releases landed on September 29, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Plainsight | 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 2 weeks | **Every 6 days** |
| Monetization | — | Free |
| Size | 27 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KLEEM STUDIO, LLC](https://appshunter.io/developer/1894041795) | [Young Hun JEONG](https://appshunter.io/developer/6786662344) |

## What reviewers say

### Plainsight

[App page](https://appshunter.io/ios/app/plainsight-private-notes/id6762402258)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plainsight - Private Notes | $4.99 | 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 Plainsight free?

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

### Is Cairn free?

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

### Do Plainsight or Cairn have ads?

Neither Plainsight nor Cairn shows ads.

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

Plainsight ships an update every 2 weeks, and Cairn every 6 days. Most recently, Plainsight was updated on September 29, 2026 and Cairn on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*