# BIONcontrol2 vs ZNP

The clearest difference is update cadence: ZNP at weekly against BIONcontrol2's every 14 months. BIONcontrol2's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

BIONcontrol2 ships an update every 14 months, ZNP weekly. The most recent releases landed on September 7, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | BIONcontrol2 | ZNP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Weekly** |
| Size | 33 MB | 127 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bion Technologies GmbH](https://appshunter.io/developer/1331472330) | [Shenzhen Cantianshu Information Technology Co., Ltd](https://appshunter.io/developer/1798896152) |

## What reviewers say

### BIONcontrol2

[App page](https://appshunter.io/ios/app/bioncontrol2/id1580233747)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZNP

[App page](https://appshunter.io/ios/app/znp/id6760087589)

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

**In-app purchases:** none


## Frequently asked questions

### Is BIONcontrol2 free?

BIONcontrol2 is free to download, with no in-app purchases.

### Is ZNP free?

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

### Do BIONcontrol2 or ZNP have ads?

Neither BIONcontrol2 nor ZNP shows ads.

### Which is updated more often, BIONcontrol2 or ZNP?

BIONcontrol2 ships an update every 14 months, and ZNP weekly. Most recently, BIONcontrol2 was updated on September 7, 2026 and ZNP on September 11, 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.*