# Math Drills Mental Arithmetic vs COSMOS

The clearest difference is price: COSMOS at Free against Math Drills Mental Arithmetic's $1.99. Math Drills Mental Arithmetic's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

COSMOS is free to download; Math Drills Mental Arithmetic costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Math Drills Mental Arithmetic | COSMOS |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 25 MB | 4 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) | [yuudai tasaki](https://appshunter.io/developer/1861229093) |

## What reviewers say

### Math Drills Mental Arithmetic

[App page](https://appshunter.io/ios/app/math-drills-mental-arithmetic/id6786557456)

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

**In-app purchases:** none


### COSMOS

[App page](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408)

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

**In-app purchases:** none


## Frequently asked questions

### Is Math Drills Mental Arithmetic free?

Math Drills Mental Arithmetic costs $1.99, with no in-app purchases.

### Is COSMOS free?

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

### Do Math Drills Mental Arithmetic or COSMOS have ads?

Neither Math Drills Mental Arithmetic nor COSMOS shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*