# Battery Master 12V vs ShotLine TMS

The clearest difference is update cadence: ShotLine TMS at every 2 weeks against Battery Master 12V's every 6 weeks. ShotLine TMS also leads on iOS requirement (13.0 vs 15.6). 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.

Battery Master 12V ships an update every 6 weeks, ShotLine TMS every 2 weeks. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Battery Master 12V | ShotLine TMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/battery-master-12v/id1480710112/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 39 MB | 41 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [ITOFROM](https://appshunter.io/developer/1699328880) |

## What reviewers say

### 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


### ShotLine TMS

[App page](https://appshunter.io/ios/app/shotline-tms/id6453409813)

**In-app purchases:** none


## Frequently asked questions

### Is Battery Master 12V free?

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

### Is ShotLine TMS free?

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

### Do Battery Master 12V or ShotLine TMS have ads?

Neither Battery Master 12V nor ShotLine TMS shows ads.

### Which is updated more often, Battery Master 12V or ShotLine TMS?

Battery Master 12V ships an update every 6 weeks, and ShotLine TMS every 2 weeks. Most recently, Battery Master 12V was updated on October 17, 2026 and ShotLine TMS on October 5, 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.*