# Near Earth Defense™ vs Memory Maths

The clearest difference is in-app purchases: Near Earth Defense™ at none against Memory Maths's 1. Near Earth Defense™ also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.6). On price and ads there is nothing between them.

Both are free to download. Memory Maths sells 1 one-off in-app purchase. Near Earth Defense™ asks for nothing beyond the download.

## The numbers

| Metric | Near Earth Defense™ | Memory Maths |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 72 MB | 3 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Olowu](https://appshunter.io/developer/1716239357) | [William McRitchie](https://appshunter.io/developer/1823233240) |

## What reviewers say

### Near Earth Defense™

[App page](https://appshunter.io/ios/app/near-earth-defense/id6499095873)

**Features:** macOS Compatibility

**In-app purchases:** none


### Memory Maths

[App page](https://appshunter.io/ios/app/memory-maths/id6751507121)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Adverts | $0.99 | one-time |


## Frequently asked questions

### Is Near Earth Defense™ free?

Near Earth Defense™ is free to download, with no in-app purchases.

### Is Memory Maths free?

Memory Maths is free to download, with in-app purchases available.

### Do Near Earth Defense™ or Memory Maths have ads?

Neither Near Earth Defense™ nor Memory Maths 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.*