# Bubble Level! vs Check KM

The clearest difference is in-app purchases: Check KM at none against Bubble Level!'s 1. Check KM also leads on ads (none vs shown). Bubble Level!'s advantage is iOS requirement (13.0 vs 17.2). On price and device support there is nothing between them.

Both are free to download. Bubble Level! sells 1 one-off in-app purchase. Check KM asks for nothing beyond the download.

## The numbers

| Metric | Bubble Level! | Check KM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Size | 49 MB | 11 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Hubert Willy Lehmann](https://appshunter.io/developer/1684815110) | [JD Business Services, LLC](https://appshunter.io/developer/1462189986) |

## What reviewers say

### Bubble Level!

[App page](https://appshunter.io/ios/app/bubble-level/id6448636249)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Check KM

[App page](https://appshunter.io/ios/app/check-km/id6504140999)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level! free?

Bubble Level! is free to download, with in-app purchases available.

### Is Check KM free?

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

### Do Bubble Level! or Check KM have ads?

Bubble Level! shows ads; Check KM does not.

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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.*