# OpenTrain AI vs DO AI

The clearest difference is iOS requirement: DO AI at 13.0 against OpenTrain AI's 15.1. 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.

## The numbers

| Metric | OpenTrain AI | DO AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 60 MB | 26 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OpenTrain AI](https://appshunter.io/developer/1896759536) | [Do Systems Inc](https://appshunter.io/developer/1546079511) |

## What reviewers say

### OpenTrain AI

[App page](https://appshunter.io/ios/app/opentrain-ai/id6770636182)

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

**In-app purchases:** none


### DO AI

[App page](https://appshunter.io/ios/app/do-ai-interview/id6770822775)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenTrain AI free?

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

### Is DO AI free?

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

### Do OpenTrain AI or DO AI have ads?

Neither OpenTrain AI nor DO AI 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.*