# BM12V vs HK Battery

The clearest difference is update cadence: BM12V at every 3 weeks against HK Battery's every 2 months. HK Battery's advantage is review sentiment (25% vs 17%) and iOS requirement (11.0 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, HK Battery every 2 months. The most recent releases landed on November 8, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | BM12V | HK Battery |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 11 MB | 13 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [俊华 邹](https://appshunter.io/developer/1276442287) | [Hardkorr](https://appshunter.io/developer/1637354677) |

## 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

**Features:** Vision Pro support

**In-app purchases:** none


### HK Battery

[App page](https://appshunter.io/ios/app/hk-battery/id1585479257)

Monitor your Hardkorr Bluetooth-enabled deep cycle batteries with this free utility app. View real-time data like state of charge, voltage, current draw, and temperature. It also provides detailed warnings and error information for supported battery models.

**Highlights:** Real-time battery voltage, State of charge monitoring, Live current draw, Temperature readings, Warnings and error alerts, Charge cycle tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BM12V free?

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

### Is HK Battery free?

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

### Do BM12V or HK Battery have ads?

Neither BM12V nor HK Battery shows ads.

### Which is updated more often, BM12V or HK Battery?

BM12V ships an update every 3 weeks, and HK Battery every 2 months. Most recently, BM12V was updated on November 8, 2026 and HK Battery 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.*