# O3 Class vs The Atticus

The clearest difference is in-app purchases: The Atticus at none against O3 Class's 3. The Atticus also leads on update cadence (every 3 weeks vs every 6 weeks). O3 Class's advantage is iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. O3 Class sells 3 one-off in-app purchases. The Atticus asks for nothing beyond the download.

O3 Class ships an update every 6 weeks, The Atticus every 3 weeks. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | O3 Class | The Atticus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 51 MB | 49 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Moments Telecomedia](https://appshunter.io/developer/417054091) | [Emily Sudduth](https://appshunter.io/developer/1721274803) |

## What reviewers say

### O3 Class

[App page](https://appshunter.io/ios/app/o3-class/id1627995167)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Adobe Photoshop | $59.99 | one-time |
| Adobe Premiere | $59.99 | one-time |
| Photography Course | $79.99 | one-time |


### The Atticus

[App page](https://appshunter.io/ios/app/the-atticus/id6480318158)

**In-app purchases:** none


## Frequently asked questions

### Is O3 Class free?

O3 Class is free to download, with in-app purchases available.

### Is The Atticus free?

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

### Do O3 Class or The Atticus have ads?

Neither O3 Class nor The Atticus shows ads.

### Which is updated more often, O3 Class or The Atticus?

O3 Class ships an update every 6 weeks, and The Atticus every 3 weeks. Most recently, O3 Class was updated on October 11, 2026 and The Atticus on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*