# Multi vs BM12V

The clearest difference is price: BM12V at Free against Multi's $9.99. BM12V also leads on update cadence (every 3 weeks vs every 3 months). Multi's advantage is review sentiment (51% vs 17%). On ads, in-app purchases, monetization model and device support there is nothing between them.

BM12V is free to download; Multi costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Multi ships an update every 3 months, BM12V every 3 weeks. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Multi | BM12V |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/multi-batt-mon/id1345741752/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | **51.3% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 11 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Amoeba New Energy Co., Ltd.](https://appshunter.io/developer/978609032) | [俊华 邹](https://appshunter.io/developer/1276442287) |

## What reviewers say

### Multi

[App page](https://appshunter.io/ios/app/multi-batt-mon/id1345741752)

Monitor multiple 12V vehicle batteries simultaneously with this app. It stores data permanently, allows export and sharing, and provides trip records and expense management. Receive notifications when near your connected devices.

**Highlights:** Monitor multiple 12V vehicle batteries, Supports 4 device connections, Permanent data storage, Data export and sharing, Trip record tracking, Vehicle expense management, Proximity notifications

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Multi free?

Multi costs $9.99, with no in-app purchases.

### Is BM12V free?

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

### Do Multi or BM12V have ads?

Neither Multi nor BM12V shows ads.

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

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