# BM12V > Real-time vehicle battery voltage monitoring via Bluetooth. (iPhone/iPad app by 俊华 邹.) - Source: https://appshunter.io/ios/app/bm12v/id1477779532 (this page in markdown: same URL + `.md`) - Developer: [俊华 邹](https://appshunter.io/developer/1276442287) - Category: Utilities - Price: Free - Age rating: 4+ - Requires: iOS 8.0 · 29 MB - Languages: Arabic, Czech, English, French, German, Italian, Polish, Romanian, Russian, Chinese and 2 more - Released: 2019-08-27 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/bm12v/id1477779532/reviews.md ## What is BM12V? Battery Monitor BM12V is an application for vehicle battery,which can let them know the real-time voltageof car battery. It helps users to know the battery fully by testing cranking and charging system voltage. All of the datas can be showed on mobile through bluetooth. ## Key features - Real-time voltage monitoring - Bluetooth connectivity - Cranking system testing - Charging system testing - Mobile data display ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/bm12v/id1477779532/reviews.md ### 2/5 — No multi battery view?? *2024-10-19* I have 3 monitors for 2 cars and 1 boat. Switching between each is a pain and not useable :( please fix this. Constant Bluetooth issues. ### 1/5 — Pretty Garbage *2024-05-24, version 1.2.2* False alerts telling me that I have low voltage, but then when you go into the app, I have 98% battery capacity. Useless - don’t bother. ### 1/5 — Extremely poor app *2023-08-10, version 1.2.2* Don’t even bother. Absolutely atrocious ### 1/5 — Don’t waste your money *2023-08-04, version 1.2.2* Unit worked perfectly for the initial setup and never connected again after that. The information that was showing on the first time used was very promising and informative. For the price of the unit, one would expect it to perform faultlessly as it looked great the first time. My advice to anyone considering purchasing this unit is that I may have gotten a doggy unit, but there are many units available that function the same for around the same price. ### 1/5 — Needs Updating *2023-03-18, version 1.2.2* Two issues: 1) Security - Data can be openly accessed 2) Multiple Connections - Show the active charge state for vehicles with multiple batteries (bonnet and tub). ### 1/5 — No connection *2022-12-09, version 1.2.2* This device does not function when it’s required. The last connection was 11pm last night and at 8:45am, can’t connect as it timed out. I do suggest other people to not buy. ### 3/5 — Multiple monitors *2022-11-15* Can you view more than one battery monitor on a list without disconnecting and reconnecting each time? ### 1/5 — Dave your money *2022-04-28, version 1.2.2* “disconnected” seems to be this app’s favourite pop up. Countless closures of the app it will eventually hook up. For a very expensive item it is very clunky ### 1/5 — No multi battery view?? *2022-03-30* I have 3 monitors for 2 cars and 1 boat. Switching between each is a pain and not useable :( please fix this. ### 1/5 — Privacy concerns *2021-07-18, version 1.2.1* This app will pull data from ANY nearby sensor. I get notifications for other people’s vehicles and you can access their data including trip information! Not great! Also the UI is very clunky, especially if you have multiple sensors. There’s no simple way to swap between sensors and you also don’t know which one is sending you notifications even if you’ve given them unique names. So much potential to be good but let down by mediocre software. ## Frequently asked questions about BM12V ### What is BM12V used for? BM12V is a utility application designed to monitor your vehicle's battery in real-time. It allows you to check the battery's voltage and test its cranking and charging systems. ### How does BM12V connect to my car battery? BM12V utilizes Bluetooth technology to connect to your vehicle's battery. This allows for wireless transmission of battery data to your mobile device. ### What kind of tests can BM12V perform? BM12V can test the cranking system voltage and the charging system voltage of your car battery. This helps users understand the overall health and performance of their battery. ### Is BM12V available on Android devices? Based on the provided data, BM12V is currently supported on iPhone and iPod devices. Android compatibility is not specified. ### How often is BM12V updated? The latest version of BM12V was released on July 28, 2021. The app was initially released on August 27, 2019, indicating updates have occurred periodically. ### Does BM12V have ads? No, BM12V does not contain advertisements. The application is free to download and use without any ad interruptions. ### What is the age rating for BM12V? BM12V has an age rating of 4+. This means it is considered suitable for children and general audiences. ### Can I see my battery data on my phone with BM12V? Yes, BM12V displays all collected battery data directly on your mobile device through its Bluetooth connection. ## Version history (last 5 releases) ### 1.2.2 — 2021-07-28 Optimize Bluetooth connection details ### 1.2.1 — 2019-10-10 Flashback issues may occur when editing synced data ### 1.2 — 2019-09-25 iOS13 compatible ### 1.1 — 2019-09-04 Optimize details ### 1.0 — 2019-08-27 No release notes. ## Apps similar to BM12V | App | Rating | Price | Category | | --- | --- | --- | --- | | [OzCharge BM12](https://appshunter.io/ios/app/ozcharge-bm12/id1447576898) | — | Free | Utilities | | [12 Volt Direct Battery Monitor](https://appshunter.io/ios/app/12-volt-direct-battery-monitor/id1671381192) | — | Free | Utilities | | [Battery Monitor BM2](https://appshunter.io/ios/app/battery-monitor-bm2/id1115492033) | 4.2 (52) | Free | Utilities | | [KA Lithium](https://appshunter.io/ios/app/ka-lithium/id6480479006) | — | Free | Utilities | | [Lithiumax Batteries](https://appshunter.io/ios/app/lithiumax-batteries/id6448943168) | — | Free | Utilities | | [BM6](https://appshunter.io/ios/app/bm6/id1561912036) | 3.1 (15) | Free | Utilities | ## More apps by 俊华 邹 - [BT1000](https://appshunter.io/ios/app/bt1000/id1273595172) - [Battery Guard BT3000](https://appshunter.io/ios/app/battery-guard-bt3000/id1435426438) - [Roadi IC1](https://appshunter.io/ios/app/roadi-ic1/id1435465085) - [Live Monitor](https://appshunter.io/ios/app/live-monitor/id1465680093) - [Matson Monitor](https://appshunter.io/ios/app/matson-monitor/id1476217094) All apps by 俊华 邹: https://appshunter.io/developer/1276442287 ## Related topics [bm12v](https://appshunter.io/ios/topics/bm12v) · [battery monitor bm2](https://appshunter.io/ios/topics/battery-monitor-bm2) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*