# OzCharge BM12 vs zComms

The clearest difference is review sentiment: OzCharge BM12 at 100% against zComms's 33%. On price, update cadence, 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.

OzCharge BM12 ships an update every 6 weeks, zComms monthly. The most recent releases landed on June 11, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | OzCharge BM12 | zComms |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free | Free |
| Size | 9 MB | 178 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Autech Australia Pty. Ltd.](https://appshunter.io/developer/1447576897) | [Ness Corporation Pty Limited](https://appshunter.io/developer/423320418) |

## What reviewers say

### OzCharge BM12

[App page](https://appshunter.io/ios/app/ozcharge-bm12/id1447576898)

Monitor your car battery's real-time voltage and test its cranking and charging systems. View all battery data directly on your mobile device via Bluetooth connection.

**Highlights:** Real-time voltage monitoring, Cranking system testing, Charging system testing, Bluetooth data transfer, Mobile device display

**Features:** macOS Compatibility

**In-app purchases:** none


### zComms

[App page](https://appshunter.io/ios/app/zcomms/id1451025309)

Transform your Ness security panel into a smart home hub. This application enables Z-Wave device control and push notifications through your mobile device via a Ness Z-Wave Gateway.

**Highlights:** Z-Wave device control, Smart home integration, Push notifications, Rule engine for automation, Remote access via mobile

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

**In-app purchases:** none


## Frequently asked questions

### Is OzCharge BM12 free?

OzCharge BM12 is free to download, with no in-app purchases.

### Is zComms free?

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

### Do OzCharge BM12 or zComms have ads?

Neither OzCharge BM12 nor zComms shows ads.

### Which is updated more often, OzCharge BM12 or zComms?

OzCharge BM12 ships an update every 6 weeks, and zComms monthly. Most recently, OzCharge BM12 was updated on June 11, 2026 and zComms on September 8, 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.*