# Büttner vs Next Level Systems Battery

The clearest difference is device support: Next Level Systems Battery at 2 against Büttner's —. Büttner's advantage is iOS requirement (13.2 vs 15.6). 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 | Büttner | Next Level Systems Battery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 3 months |
| Size | 27 MB | 24 MB |
| Requires iOS | **13.2** | 15.6 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DOMETIC MOBILE POWER ITALY S.r.l.](https://appshunter.io/developer/1715492783) | [Next Level Systems GmbH](https://appshunter.io/developer/1804878050) |

## What reviewers say

### Büttner

[App page](https://appshunter.io/ios/app/buttner/id6471507273)

**In-app purchases:** none


### Next Level Systems Battery

[App page](https://appshunter.io/ios/app/next-level-systems-battery/id6759964491)

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

**In-app purchases:** none


## Frequently asked questions

### Is Büttner free?

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

### Is Next Level Systems Battery free?

Next Level Systems Battery 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.*