# Radioactivity vs Find Missing Addends Or Sum

The clearest difference is price: Find Missing Addends Or Sum at Free against Radioactivity's $0.99. Find Missing Addends Or Sum also leads on device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Find Missing Addends Or Sum is free to download; Radioactivity costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Radioactivity | Find Missing Addends Or Sum |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | — |
| Size | 52 MB | 34 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Radioactivity

[App page](https://appshunter.io/ios/app/radioactivity-physics/id1136130171)

**Features:** macOS Compatibility

**In-app purchases:** none


### Find Missing Addends Or Sum

[App page](https://appshunter.io/ios/app/find-missing-addends-or-sum/id6702024727)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radioactivity free?

Radioactivity costs $0.99, with no in-app purchases.

### Is Find Missing Addends Or Sum free?

Find Missing Addends Or Sum is free to download, with no in-app purchases.

### Do Radioactivity or Find Missing Addends Or Sum have ads?

Neither Radioactivity nor Find Missing Addends Or Sum shows ads.

---

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