# MightyDay vs Cairn

The clearest difference is update cadence: Cairn at every 3 days against MightyDay's every 2 weeks. MightyDay's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. MightyDay sells 3 in-app purchases, starting at $5.99 per month and Cairn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MightyDay ships an update every 2 weeks, Cairn every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MightyDay | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (77 ratings)](https://appshunter.io/ios/app/mightyday-day-planner-to-do/id1482497035/reviews)** | — |
| Number of ratings | **77** | — |
| Positive reviews | 64.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 101 MB | 18 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RABBITEYE LAB LLP](https://appshunter.io/developer/1482497034) | [Shrey Pinnada](https://appshunter.io/developer/6811047463) |

## What reviewers say

### MightyDay

[App page](https://appshunter.io/ios/app/mightyday-day-planner-to-do/id1482497035)

Organize your day with a visual timeline that integrates your calendar, tasks, routines, and habits. Break down complex projects into manageable subtasks and receive timely notifications to stay on track. Capture ideas on the go and visualize your schedule across multiple devices.

**Highlights:** Visual timeline organizer, Multi-level subtasks, Task notifications, Calendar and large views, Inbox for quick capture, Recurring tasks, Task completion tracking

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MightyDay Pro - Monthly | $5.99 | per month |
| MightyDay Pro - Yearly | $9.99 | per year |
| MightyDay Pro - Yearly | $27.99 | per year |


### Cairn

[App page](https://appshunter.io/ios/app/cairn-your-second-brain/id6811047461)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn+ Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is MightyDay free?

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

### Is Cairn free?

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

### Do MightyDay or Cairn have ads?

Neither MightyDay nor Cairn shows ads.

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

MightyDay ships an update every 2 weeks, and Cairn every 3 days. Most recently, MightyDay was updated on November 3, 2026 and Cairn 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.*