# O vs ClassLOG

The clearest difference is update cadence: ClassLOG at weekly against O's every 4 months. O's advantage is iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

O ships an update every 4 months, ClassLOG weekly. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | O | ClassLOG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 41 MB | 142 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Showcase Gig Inc.](https://appshunter.io/developer/641565881) | [Shin Naka](https://appshunter.io/developer/1639451663) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/oder/id1246644061)

**Features:** macOS Compatibility

**In-app purchases:** none


### ClassLOG

[App page](https://appshunter.io/ios/app/classlog-class-and-teacher/id6761754406)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is ClassLOG free?

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

### Do O or ClassLOG have ads?

Neither O nor ClassLOG shows ads.

### Which is updated more often, O or ClassLOG?

O ships an update every 4 months, and ClassLOG weekly. Most recently, O was updated on October 4, 2026 and ClassLOG on October 10, 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.*