# Corebox vs Cairn

The clearest difference is price: Cairn at Free against Corebox's $0.99. Corebox's advantage is in-app purchases (none vs 1) and iOS requirement (18.0 vs 26.0). On ads and device support there is nothing between them.

Cairn is free to download; Corebox costs $0.99 up front. Cairn sells 1 one-off in-app purchase. Corebox asks for nothing beyond the download.

## The numbers

| Metric | Corebox | Cairn |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cairn-countdown-and-days-since/id6805060074/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Free |
| Size | 6 MB | 20 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [飞 吕](https://appshunter.io/developer/1851387805) |

## What reviewers say

### Corebox

[App page](https://appshunter.io/ios/app/corebox-geology-core/id6799458002)

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

**In-app purchases:** none


### Cairn

[App page](https://appshunter.io/ios/app/cairn-countdown-and-days-since/id6805060074)

Track important upcoming dates and past anniversaries with a versatile countdown and count-up tool. It offers precise timing, customizable reminders, and various visual displays to keep you informed. Integrates seamlessly with your devices and data.

**Highlights:** Countdown and count-up for any event, Minute and second precision timing, Customizable repeat intervals, Time zone support, Visual progress tracking, Milestone markers, Home and Lock Screen widgets

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $2.99 | one-time |


## Frequently asked questions

### Is Corebox free?

Corebox costs $0.99, with no in-app purchases.

### Is Cairn free?

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

### Do Corebox or Cairn have ads?

Neither Corebox nor Cairn shows ads.

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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.*