# Number Master vs Devfest London

The clearest difference is device support: Number Master at 3 against Devfest London's —. Devfest London's advantage is iOS requirement (12.0 vs 15.5). On price 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.

## The numbers

| Metric | Number Master | Devfest London |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Every 9 days | — |
| Size | 25 MB | 89 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [CometStudio(KR)](https://appshunter.io/developer/1329844522) | [SUPRTECH LTD](https://appshunter.io/developer/1708024771) |

## What reviewers say

### Number Master

[App page](https://appshunter.io/ios/app/number-master/id1570770231)

**Features:** macOS Compatibility

**In-app purchases:** none


### Devfest London

[App page](https://appshunter.io/ios/app/devfest-london/id6470840802)

**In-app purchases:** none


## Frequently asked questions

### Is Number Master free?

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

### Is Devfest London free?

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

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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.*