# OzCharge BM12 vs Solar Panel Angle Calculator

The clearest difference is price: OzCharge BM12 at Free against Solar Panel Angle Calculator's $1.99. OzCharge BM12 also leads on iOS requirement (12.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

OzCharge BM12 is free to download; Solar Panel Angle Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | OzCharge BM12 | Solar Panel Angle Calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free | — |
| Size | 9 MB | 10 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Autech Australia Pty. Ltd.](https://appshunter.io/developer/1447576897) | [Netflowers Inc.](https://appshunter.io/developer/1672067319) |

## 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


### Solar Panel Angle Calculator

[App page](https://appshunter.io/ios/app/solar-panel-angle-calculator/id6794157717)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OzCharge BM12 free?

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

### Is Solar Panel Angle Calculator free?

Solar Panel Angle Calculator costs $1.99, with no in-app purchases.

### Do OzCharge BM12 or Solar Panel Angle Calculator have ads?

Neither OzCharge BM12 nor Solar Panel Angle Calculator shows ads.

### Which is updated more often, OzCharge BM12 or Solar Panel Angle Calculator?

OzCharge BM12 ships an update every 6 weeks, and Solar Panel Angle Calculator every 6 weeks. Most recently, OzCharge BM12 was updated on October 14, 2026 and Solar Panel Angle Calculator on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*