# OPNDataCheck vs CAMMUS

The clearest difference is update cadence: CAMMUS at every 3 weeks against OPNDataCheck's every 51 months. CAMMUS also leads on iOS requirement (12.0 vs 15.0). 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.

OPNDataCheck ships an update every 51 months, CAMMUS every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | OPNDataCheck | CAMMUS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.1 (8 ratings)](https://appshunter.io/ios/app/cammus/id1580325132/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 51 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 3 MB | 110 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [OPTOELECTRONICS Co.,Ltd.](https://appshunter.io/developer/556827248) | [Shenzhen Cammus Electronic Technology Co., Ltd.](https://appshunter.io/developer/1024909287) |

## What reviewers say

### OPNDataCheck

[App page](https://appshunter.io/ios/app/opndatacheck/id893116265)

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

**In-app purchases:** none


### CAMMUS

[App page](https://appshunter.io/ios/app/cammus/id1580325132)

This app allows users to control and debug a specific computer simulator. It enables Bluetooth connectivity to the device, adjustment of various simulator parameters, and saving of custom modes for future use.

**Highlights:** Control computer simulator, Debug simulator functions, Bluetooth device connection, Adjust simulator parameters, Save custom modes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPNDataCheck free?

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

### Is CAMMUS free?

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

### Do OPNDataCheck or CAMMUS have ads?

Neither OPNDataCheck nor CAMMUS shows ads.

### Which is updated more often, OPNDataCheck or CAMMUS?

OPNDataCheck ships an update every 51 months, and CAMMUS every 3 weeks. Most recently, OPNDataCheck was updated on November 1, 2026 and CAMMUS on November 3, 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.*