# ClassLog vs Cairn

The clearest difference is price: ClassLog at Free against Cairn's $0.99. ClassLog also leads on iOS requirement (14.0 vs 26.0). Cairn's advantage is update cadence (weekly vs monthly). On ads, in-app purchases and device support there is nothing between them.

ClassLog is free to download; Cairn costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ClassLog ships an update monthly, Cairn weekly. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ClassLog | Cairn |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free |
| Size | 21 MB | 8 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [明昭 路](https://appshunter.io/developer/1890357342) | [飞 吕](https://appshunter.io/developer/1851387805) |

## What reviewers say

### ClassLog

[App page](https://appshunter.io/ios/app/classlog-attendance-tracker/id6791393409)

**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:** none


## Frequently asked questions

### Is ClassLog free?

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

### Is Cairn free?

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

### Do ClassLog or Cairn have ads?

Neither ClassLog nor Cairn shows ads.

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

ClassLog ships an update monthly, and Cairn weekly. Most recently, ClassLog was updated on October 7, 2026 and Cairn on October 9, 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.*