# Math Sphere vs Underway

The clearest difference is iOS requirement: Math Sphere at 13.0 against Underway's 18.0. 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 | Underway |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 25 MB | 10 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [otsuki hayato](https://appshunter.io/developer/1828600192) | [Cylandea Systems LLC](https://appshunter.io/developer/1852250376) |

## What reviewers say

### Math Sphere

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Underway

[App page](https://appshunter.io/ios/app/underway-notes-and-tasks/id6788003889)

**Features:** macOS Compatibility, Apple Watch app, 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 Underway free?

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

### Do Math Sphere or Underway have ads?

Neither Math Sphere nor Underway shows ads.

---

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