# MonoTodo vs Cairn

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

Both are free to download. MonoTodo sells 1 one-off in-app purchase and Cairn sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

MonoTodo ships an update weekly, Cairn every 5 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | MonoTodo | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 41 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Jichan Hwang](https://appshunter.io/developer/1735193590) | [Heajung Yoo](https://appshunter.io/developer/1895444232) |

## What reviewers say

### MonoTodo

[App page](https://appshunter.io/ios/app/monotodo/id6740999487)

This app helps you manage your time by focusing on a single daily goal. It displays the remaining time to achieve your objective, providing real-time progress. Utilize statistics to maintain motivation and a sense of accomplishment.

**Highlights:** Real-time countdown to goal achievement, Focus on a single daily objective, Statistics for motivation, Simple and intuitive interface, Track progress and build accomplishment

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 모노투두 프리미엄 (광고 영구 제거) | $1.99 | one-time |


### Cairn

[App page](https://appshunter.io/ios/app/cairn/id6767776784)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn Pro Monthly | $1.99 | per month |
| Cairn Pro yearly | $12.99 | per year |
| Cairn Pro - Ad-free forever | $0.99 | one-time |


## Frequently asked questions

### Is MonoTodo free?

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

### Is Cairn free?

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

### Do MonoTodo or Cairn have ads?

Cairn shows ads; MonoTodo does not.

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

MonoTodo ships an update weekly, and Cairn every 5 days. Most recently, MonoTodo was updated on October 30, 2026 and Cairn on October 25, 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.*