# GPF Bubble Level vs Ham Engineering

The clearest difference is device support: Ham Engineering at 3 against GPF Bubble Level's 1. Ham Engineering also leads on iOS requirement (13.0 vs 18.6). On price, ads 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 | GPF Bubble Level | Ham Engineering |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 0 MB | 21 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gian Paolo Fontani](https://appshunter.io/developer/1866631629) | [Yousif AL Balushi](https://appshunter.io/developer/1855752610) |

## What reviewers say

### GPF Bubble Level

[App page](https://appshunter.io/ios/app/gpf-bubble-level/id6759933601)

**In-app purchases:** none


### Ham Engineering

[App page](https://appshunter.io/ios/app/ham-engineering/id6795236723)

**In-app purchases:** none


## Frequently asked questions

### Is GPF Bubble Level free?

GPF Bubble Level is free to download, with no in-app purchases.

### Is Ham Engineering free?

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

### Do GPF Bubble Level or Ham Engineering have ads?

Neither GPF Bubble Level nor Ham Engineering 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.*