# Nine vs MathBack

The clearest difference is ads: Nine at none against MathBack's shown. MathBack's advantage is update cadence (every 2 days vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Nine ships an update every 6 weeks, MathBack every 2 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Nine | MathBack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Size | 41 MB | 314 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mehmet Serhat Cakir](https://appshunter.io/developer/1507768127) | [Jan Fruseth](https://appshunter.io/developer/1775256534) |

## What reviewers say

### Nine

[App page](https://appshunter.io/ios/app/nine-number-block-puzzle-game/id6477066347)

**Features:** macOS Compatibility

**In-app purchases:** none


### MathBack

[App page](https://appshunter.io/ios/app/mathback/id6737205121)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nine free?

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

### Is MathBack free?

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

### Do Nine or MathBack have ads?

MathBack shows ads; Nine does not.

### Which is updated more often, Nine or MathBack?

Nine ships an update every 6 weeks, and MathBack every 2 days. Most recently, Nine was updated on October 20, 2026 and MathBack 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.*