# Robotrix vs PMI

The clearest difference is in-app purchases: Robotrix at none against PMI's 3. Robotrix also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PMI sells 3 in-app purchases, starting at $7.99 per month. Robotrix asks for nothing beyond the download.

Robotrix ships an update every 5 weeks, PMI every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Robotrix | PMI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 18 MB | 93 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IEM AMERICA CORPORATION](https://appshunter.io/developer/1489147623) | [Tuan Anh Nguyen](https://appshunter.io/developer/1851661845) |

## What reviewers say

### Robotrix

[App page](https://appshunter.io/ios/app/robotrix/id6466579517)

**Features:** macOS Compatibility

**In-app purchases:** none


### PMI

[App page](https://appshunter.io/ios/app/pmi-sp-exam-simulator/id6472605377)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $7.99 | per month |
| Premium Quarterly | $14.99 | per 3 months |
| Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is Robotrix free?

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

### Is PMI free?

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

### Do Robotrix or PMI have ads?

Neither Robotrix nor PMI shows ads.

### Which is updated more often, Robotrix or PMI?

Robotrix ships an update every 5 weeks, and PMI every 2 months. Most recently, Robotrix was updated on October 25, 2026 and PMI on October 24, 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.*