# Math Sphere vs MD Inbox

The clearest difference is iOS requirement: Math Sphere at 13.0 against MD Inbox's 26.0. 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 | Math Sphere | MD Inbox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 25 MB | 4 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [otsuki hayato](https://appshunter.io/developer/1828600192) | [Beka Demuradze](https://appshunter.io/developer/1550282440) |

## What reviewers say

### Math Sphere

[App page](https://appshunter.io/ios/app/math-sphere/id6749747366)

**Features:** macOS Compatibility

**In-app purchases:** none


### MD Inbox

[App page](https://appshunter.io/ios/app/md-inbox/id6770068101)

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

**In-app purchases:** none


## Frequently asked questions

### Is Math Sphere free?

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

### Is MD Inbox free?

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

### Do Math Sphere or MD Inbox have ads?

Neither Math Sphere nor MD Inbox 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.*