# Multi vs OzCharge BM12

The clearest difference is review sentiment: OzCharge BM12 at 100% against Multi's 51%. OzCharge BM12 also leads on price (Free vs $9.99) and iOS requirement (12.0 vs 15.0). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

OzCharge BM12 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, OzCharge BM12 every 6 weeks. The most recent releases landed on September 23, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Multi | OzCharge BM12 |
| --- | --- | --- |
| 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 | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 9 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Amoeba New Energy Co., Ltd.](https://appshunter.io/developer/978609032) | [Autech Australia Pty. Ltd.](https://appshunter.io/developer/1447576897) |

## 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


### 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


## Frequently asked questions

### Is Multi free?

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

### Is OzCharge BM12 free?

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

### Do Multi or OzCharge BM12 have ads?

Neither Multi nor OzCharge BM12 shows ads.

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

Multi ships an update every 3 months, and OzCharge BM12 every 6 weeks. Most recently, Multi was updated on September 23, 2026 and OzCharge BM12 on June 11, 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.*