# ChallengeAddition&Subtraction vs Make 10

The clearest difference is ads: ChallengeAddition&Subtraction at none against Make 10's shown. ChallengeAddition&Subtraction also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 25, 2026.

## The numbers

| Metric | ChallengeAddition&Subtraction | Make 10 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Size | 58 MB | 33 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [koichi kodama](https://appshunter.io/developer/1679265192) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### ChallengeAddition&Subtraction

[App page](https://appshunter.io/ios/app/challengeaddition-and-subtraction/id6446822143)

**In-app purchases:** none


### Make 10

[App page](https://appshunter.io/ios/app/make-10-mental-math/id6477751967)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChallengeAddition&Subtraction free?

ChallengeAddition&Subtraction is free to download, with no in-app purchases.

### Is Make 10 free?

Make 10 is free to download, with no in-app purchases.

### Do ChallengeAddition&Subtraction or Make 10 have ads?

Make 10 shows ads; ChallengeAddition&Subtraction does not.

### Which is updated more often, ChallengeAddition&Subtraction or Make 10?

ChallengeAddition&Subtraction ships an update fortnightly, and Make 10 fortnightly. Most recently, ChallengeAddition&Subtraction was updated on October 25, 2026 and Make 10 on October 25, 2026.

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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.*