# BM12V vs BM6

The clearest difference is review sentiment: BM6 at 46% against BM12V's 23%. BM12V's advantage is update cadence (every 3 weeks vs every 5 weeks) and iOS requirement (8.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

BM12V ships an update every 3 weeks, BM6 every 5 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | BM12V | BM6 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.2 (17 ratings)](https://appshunter.io/ios/app/bm6/id1561912036/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | 23.1% of reviews | **45.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 29 MB | 64 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [俊华 邹](https://appshunter.io/developer/1276442287) | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) |

## What reviewers say

### BM12V

[App page](https://appshunter.io/ios/app/bm12v/id1477779532)

Monitor your vehicle's battery in real-time via Bluetooth. Test cranking and charging systems to ensure your battery is in optimal condition. View all data directly on your mobile device.

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

**In-app purchases:** none


### BM6

[App page](https://appshunter.io/ios/app/bm6/id1561912036)

Monitor your car's battery in real-time via Bluetooth. This app tests starting and charging systems, records engine start/stop times, and displays all data on your mobile device for easy management of your vehicle's battery power.

**Highlights:** Real-time battery voltage monitoring, Starting system voltage test, Charging system voltage test, Records engine start/stop times, Bluetooth data display, Vehicle battery power management

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is BM12V free?

BM12V is free to download, with no in-app purchases.

### Is BM6 free?

BM6 is free to download, with no in-app purchases.

### Do BM12V or BM6 have ads?

Neither BM12V nor BM6 shows ads.

### Which is updated more often, BM12V or BM6?

BM12V ships an update every 3 weeks, and BM6 every 5 weeks. Most recently, BM12V was updated on October 9, 2026 and BM6 on October 13, 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.*