# DuoBrain vs CATHO SCHOOL CI

The clearest difference is in-app purchases: CATHO SCHOOL CI at none against DuoBrain's 6. CATHO SCHOOL CI also leads on iOS requirement (15.1 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. DuoBrain sells 6 in-app purchases, starting at $9.99 per month. CATHO SCHOOL CI asks for nothing beyond the download.

## The numbers

| Metric | DuoBrain | CATHO SCHOOL CI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 48 MB | 66 MB |
| Requires iOS | 18.5 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AIFA Technology FZ LLE](https://appshunter.io/developer/1858981023) | [KOUAO HERVE WILFRIED BONI](https://appshunter.io/developer/6807399514) |

## What reviewers say

### DuoBrain

[App page](https://appshunter.io/ios/app/duobrain-speak-at-work/id6756188731)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Membership | $9.99 | per month |
| 1 Month Membership | $24.99 | per month |
| Annual Membership Promo | $58.99 | per year |
| Annual Membership | $99.99 | per year |
| Annual Membership Promo | $119.99 | per year |
| Annual Membership | $199.99 | per year |


### CATHO SCHOOL CI

[App page](https://appshunter.io/ios/app/catho-school-ci/id6807400930)

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

**In-app purchases:** none


## Frequently asked questions

### Is DuoBrain free?

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

### Is CATHO SCHOOL CI free?

CATHO SCHOOL CI is free to download, with no in-app purchases.

### Do DuoBrain or CATHO SCHOOL CI have ads?

Neither DuoBrain nor CATHO SCHOOL CI shows ads.

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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.*