# OzCharge BM12 vs Stemco Fleet Manager

The clearest difference is update cadence: Stemco Fleet Manager at every 3 weeks against OzCharge BM12's every 6 weeks. OzCharge BM12's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

OzCharge BM12 ships an update every 6 weeks, Stemco Fleet Manager every 3 weeks. The most recent releases landed on June 11, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | OzCharge BM12 | Stemco Fleet Manager |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 83 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Autech Australia Pty. Ltd.](https://appshunter.io/developer/1447576897) | [Stemco](https://appshunter.io/developer/1596782366) |

## What reviewers say

### 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


### Stemco Fleet Manager

[App page](https://appshunter.io/ios/app/stemco-fleet-manager/id1596782364)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OzCharge BM12 free?

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

### Is Stemco Fleet Manager free?

Stemco Fleet Manager is free to download, with no in-app purchases.

### Do OzCharge BM12 or Stemco Fleet Manager have ads?

Neither OzCharge BM12 nor Stemco Fleet Manager shows ads.

### Which is updated more often, OzCharge BM12 or Stemco Fleet Manager?

OzCharge BM12 ships an update every 6 weeks, and Stemco Fleet Manager every 3 weeks. Most recently, OzCharge BM12 was updated on June 11, 2026 and Stemco Fleet Manager on September 14, 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.*