# Royal Conversion Battery vs DeviceTestApp

The clearest difference is update cadence: DeviceTestApp at every 11 days against Royal Conversion Battery's every 12 months. Royal Conversion Battery's advantage is iOS requirement (12.0 vs 15.0). 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.

Royal Conversion Battery ships an update every 12 months, DeviceTestApp every 11 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Royal Conversion Battery | DeviceTestApp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 11 days** |
| Size | 43 MB | 2 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sterling Power](https://appshunter.io/developer/1639822244) | [GALAXY TELECOM](https://appshunter.io/developer/905658140) |

## What reviewers say

### Royal Conversion Battery

[App page](https://appshunter.io/ios/app/royal-conversion-battery/id6740916550)

**Features:** macOS Compatibility

**In-app purchases:** none


### DeviceTestApp

[App page](https://appshunter.io/ios/app/devicetestapp/id6758030896)

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

**In-app purchases:** none


## Frequently asked questions

### Is Royal Conversion Battery free?

Royal Conversion Battery is free to download, with no in-app purchases.

### Is DeviceTestApp free?

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

### Do Royal Conversion Battery or DeviceTestApp have ads?

Neither Royal Conversion Battery nor DeviceTestApp shows ads.

### Which is updated more often, Royal Conversion Battery or DeviceTestApp?

Royal Conversion Battery ships an update every 12 months, and DeviceTestApp every 11 days. Most recently, Royal Conversion Battery was updated on November 8, 2026 and DeviceTestApp on October 31, 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.*