# O3 Class vs LinguaFlow

The clearest difference is update cadence: LinguaFlow at every 6 days against O3 Class's every 6 weeks. O3 Class's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. O3 Class sells 3 one-off in-app purchases and LinguaFlow sells 5 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

O3 Class ships an update every 6 weeks, LinguaFlow every 6 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | O3 Class | LinguaFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Size | 51 MB | 74 MB |
| Requires iOS | **12.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Moments Telecomedia](https://appshunter.io/developer/417054091) | [LinguaFlow e.U.](https://appshunter.io/developer/1810022094) |

## 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 |


### LinguaFlow

[App page](https://appshunter.io/ios/app/linguaflow-language-learning/id6744939323)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Feature | $5.99 | per month |
| LinguaFlow Pro Wöchentlich | $8.99 | per 7 days |
| LinguaFlow Pro Quartalsweise | $49.99 | per 3 months |
| LinguaFlow Pro Jährlich | $99.99 | per year |
| Premium Feature | $2.99 | one-time |


## Frequently asked questions

### Is O3 Class free?

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

### Is LinguaFlow free?

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

### Do O3 Class or LinguaFlow have ads?

Neither O3 Class nor LinguaFlow shows ads.

### Which is updated more often, O3 Class or LinguaFlow?

O3 Class ships an update every 6 weeks, and LinguaFlow every 6 days. Most recently, O3 Class was updated on October 11, 2026 and LinguaFlow on October 8, 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.*