# Dr. Computer vs Eri.cards

The clearest difference is ads: Eri.cards at none against Dr. Computer's shown. Dr. Computer's advantage is iOS requirement (10.0 vs 15.0). 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.

## The numbers

| Metric | Dr. Computer | Eri.cards |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | — |
| Monetization | Ad-supported | — |
| Size | 44 MB | 2 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SUD Inc.](https://appshunter.io/developer/453469451) | [Sergey Rumyantsev](https://appshunter.io/developer/1714686825) |

## What reviewers say

### Dr. Computer

[App page](https://appshunter.io/ios/app/dr-computer/id1491200188)

Solve math puzzles by composing equations to match target numbers using colored digits and symbols. This game challenges your logic and arithmetic skills.

**Highlights:** Equation composition, Colored numbers and symbols, Logic challenges, Arithmetic practice, Puzzle gameplay

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

**In-app purchases:** none


### Eri.cards

[App page](https://appshunter.io/ios/app/ericards/id6471030786)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Computer free?

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

### Is Eri.cards free?

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

### Do Dr. Computer or Eri.cards have ads?

Dr. Computer shows ads; Eri.cards does not.

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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.*