# RoE (Ro vs Materrium

The clearest difference is ads: RoE (Ro at none against Materrium's shown. RoE (Ro also leads on iOS requirement (15.0 vs 17.0). Materrium's advantage is update cadence (every 2 months vs every 4 months). On price, 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.

RoE (Ro ships an update every 4 months, Materrium every 2 months. The most recent releases landed on September 26, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | RoE (Ro | Materrium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 298 MB | 17 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 9+ |
| Developer | [ROBOROBO Co.,Ltd](https://appshunter.io/developer/942989164) | [VOLKAN TEZKAN](https://appshunter.io/developer/1796866756) |

## What reviewers say

### RoE (Ro

[App page](https://appshunter.io/ios/app/roe-ro-e/id1610047236)

**Features:** macOS Compatibility

**In-app purchases:** none


### Materrium

[App page](https://appshunter.io/ios/app/materrium/id6796025701)

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

**In-app purchases:** none


## Frequently asked questions

### Is RoE (Ro free?

RoE (Ro is free to download, with no in-app purchases.

### Is Materrium free?

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

### Do RoE (Ro or Materrium have ads?

Materrium shows ads; RoE (Ro does not.

### Which is updated more often, RoE (Ro or Materrium?

RoE (Ro ships an update every 4 months, and Materrium every 2 months. Most recently, RoE (Ro was updated on September 26, 2026 and Materrium on October 15, 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.*