# Brain Tree School vs DUO App

The clearest difference is update cadence: DUO App at every 3 weeks against Brain Tree School's every 2 months. 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.

Brain Tree School ships an update every 2 months, DUO App every 3 weeks. Both last shipped on October 11, 2026.

## The numbers

| Metric | Brain Tree School | DUO App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 34 MB | 48 MB |
| Requires iOS | **14** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SCHOOL IBOX S.A.S. DE C.V.](https://appshunter.io/developer/1271228289) | [Blueberry Technologies Inc](https://appshunter.io/developer/1752193826) |

## What reviewers say

### Brain Tree School

[App page](https://appshunter.io/ios/app/brain-tree-school/id1476991583)

**Features:** macOS Compatibility

**In-app purchases:** none


### DUO App

[App page](https://appshunter.io/ios/app/duo-app/id6504420695)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Brain Tree School free?

Brain Tree School is free to download, with no in-app purchases.

### Is DUO App free?

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

### Do Brain Tree School or DUO App have ads?

Neither Brain Tree School nor DUO App shows ads.

### Which is updated more often, Brain Tree School or DUO App?

Brain Tree School ships an update every 2 months, and DUO App every 3 weeks. Most recently, Brain Tree School was updated on October 11, 2026 and DUO App on October 11, 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.*