# Battery Master 12V vs AOD Battery

Battery Master 12V and AOD Battery both sit at 3.4 stars, but that hides the real split: 50% of AOD Battery's written reviews are positive against 0% of Battery Master 12V's. AOD Battery also leads on update cadence (every 4 days vs every 6 weeks). Battery Master 12V's advantage is in-app purchases (none vs 2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. AOD Battery sells 2 one-off in-app purchases. Battery Master 12V asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.4 for Battery Master 12V against 3.3 for AOD Battery. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews are what separate them: 0% of Battery Master 12V's written reviews are positive against 50% of AOD Battery's.

Battery Master 12V ships an update every 6 weeks, AOD Battery every 4 days. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Battery Master 12V | AOD Battery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/battery-master-12v/id1480710112/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/aod-battery/id1660418159/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 39 MB | 1 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [MAPLEFORM TECHNOLOGY INC.](https://appshunter.io/developer/1660418161) |

## 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


### AOD Battery

[App page](https://appshunter.io/ios/app/aod-battery/id1660418159)

This utility app displays your phone's battery percentage on the inline widget area. It's especially useful for iPhones with Always-On display to quickly check power levels. Refresh the widget by tapping it if the percentage appears outdated.

**Highlights:** Always-On Display battery percentage, Inline widget display, Quick refresh by tapping widget, iPhone compatibility

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10-day Trial | Free | one-time |
| AOD Battery | $4.99 | one-time |


## Frequently asked questions

### Is Battery Master 12V free?

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

### Is AOD Battery free?

AOD Battery is free to download, with in-app purchases available.

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

Battery Master 12V is rated higher. Battery Master 12V averages 3.4 out of 5 from 5 ratings, while AOD Battery averages 3.3 from 3 ratings.

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

Neither Battery Master 12V nor AOD Battery shows ads.

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

Battery Master 12V ships an update every 6 weeks, and AOD Battery every 4 days. Most recently, Battery Master 12V was updated on October 17, 2026 and AOD Battery on October 24, 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.*