# Battery Master 12V vs microdss

The clearest difference is iOS requirement: microdss at 13 against Battery Master 12V's 15.6. 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 ships an update every 6 weeks, microdss every 5 weeks. The most recent releases landed on September 10, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | Battery Master 12V | microdss |
| --- | --- | --- |
| 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 5 weeks** |
| Monetization | Free | — |
| Size | 39 MB | 9 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [LiteColor Technology Limited](https://appshunter.io/developer/1895701736) |

## 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


### microdss

[App page](https://appshunter.io/ios/app/microdss/id6670539394)

**Features:** macOS Compatibility

**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 microdss free?

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

### Do Battery Master 12V or microdss have ads?

Neither Battery Master 12V nor microdss shows ads.

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

Battery Master 12V ships an update every 6 weeks, and microdss every 5 weeks. Most recently, Battery Master 12V was updated on September 10, 2026 and microdss on July 8, 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.*