# Battery Tracker BTR vs Battery Master 12V

The clearest difference is rating: Battery Master 12V at 3.4 against Battery Tracker BTR's 2.9. Battery Tracker BTR's advantage is review sentiment (26% vs 0%) and ratings volume (21 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Battery Master 12V holds the better App Store score, 3.4 against 2.9. Both are backed by a comparable volume of ratings — 21 and 5 respectively. Written reviews complicate that: 26% of Battery Tracker BTR's written reviews are positive against 0% of Battery Master 12V's, so the app with the better star average is not the one people write more warmly about.

Battery Tracker BTR ships an update every 2 months, Battery Master 12V every 6 weeks. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Battery Tracker BTR | Battery Master 12V |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (21 ratings)](https://appshunter.io/ios/app/battery-tracker-btr/id1450596783/reviews) | **[3.4 (5 ratings)](https://appshunter.io/ios/app/battery-master-12v/id1480710112/reviews)** |
| Number of ratings | **21** | 5 |
| Positive reviews | **26.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 20 MB | 39 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antigravity Batteries LLC](https://appshunter.io/developer/1450596782) | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) |

## What reviewers say

### Battery Tracker BTR

[App page](https://appshunter.io/ios/app/battery-tracker-btr/id1450596783)

Monitor your vehicle's battery health in real-time. This app displays live voltage readings and tests your car's cranking and charging systems. All data is accessible on your mobile device via Bluetooth connection.

**Highlights:** Real-time voltage display, Cranking system testing, Charging system testing, Bluetooth connectivity, Mobile data display

**Features:** macOS Compatibility

**In-app purchases:** none


### Battery Master 12V

[App page](https://appshunter.io/ios/app/battery-master-12v/id1480710112)

This tool detects and tests lead-acid batteries, assessing CCA and health. It calculates remaining battery life based on temperature and CCA data. Users can also test cranking and charging systems, with all results shareable and printable.

**Highlights:** Lead-acid battery detection, Test battery CCA and health, Calculate available use life, Test cranking system, Test charging system, Share and print test results

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Battery Tracker BTR free?

Battery Tracker BTR is free to download, with no in-app purchases.

### Is Battery Master 12V free?

Battery Master 12V is free to download, with no in-app purchases.

### Which has better reviews, Battery Tracker BTR or Battery Master 12V?

Battery Master 12V is rated higher. Battery Tracker BTR averages 2.9 out of 5 from 21 ratings, while Battery Master 12V averages 3.4 from 5 ratings.

### Do Battery Tracker BTR or Battery Master 12V have ads?

Neither Battery Tracker BTR nor Battery Master 12V shows ads.

### Which is updated more often, Battery Tracker BTR or Battery Master 12V?

Battery Tracker BTR ships an update every 2 months, and Battery Master 12V every 6 weeks. Most recently, Battery Tracker BTR was updated on October 18, 2026 and Battery Master 12V on October 17, 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.*