# Mercury Diagnostic App vs Power Queen

The clearest difference is update cadence: Power Queen at every 3 weeks against Mercury Diagnostic App's every 11 months. Power Queen also leads on ratings volume (43 vs 1). Mercury Diagnostic App's advantage is rating (3.0 vs 2.7) and iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Mercury Diagnostic App holds the better App Store score, 3.0 against 2.7. That said, the two scores are not equally well evidenced: Power Queen has 43 ratings behind it against 1, so its average is the more settled of the two.

Mercury Diagnostic App ships an update every 11 months, Power Queen every 3 weeks. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Mercury Diagnostic App | Power Queen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/mercury-diagnostic-app/id1491041580/reviews)** | [2.7 (43 ratings)](https://appshunter.io/ios/app/power-queen/id6482988823/reviews) |
| Number of ratings | 1 | **43** |
| Positive reviews | — | 24.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 73 MB | 47 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Mercury Marine LLC](https://appshunter.io/developer/1777822540) | [Shenzhen Lizu Shidai Technology](https://appshunter.io/developer/1698437611) |

## What reviewers say

### Mercury Diagnostic App

[App page](https://appshunter.io/ios/app/mercury-diagnostic-app/id1491041580)

This app allows Mercury dealer technicians to perform basic diagnostics on SmartCraft® engines. It provides live engine data, fault information, runtime history, and custom data lists. Full functionality requires a license key and a VesselView Mobile module.

**Highlights:** View live SmartCraft® engine data, Create custom data lists, Obtain active faults, View runtime history, Enter maintenance records, Wireless communication via Bluetooth

**Features:** Vision Pro support

**In-app purchases:** none


### Power Queen

[App page](https://appshunter.io/ios/app/power-queen/id6482988823)

Monitor and manage your energy storage battery devices in real-time via Bluetooth. Achieve a smart lifestyle with reliable energy management solutions, making your life more convenient and efficient from anywhere.

**Highlights:** Real-time battery monitoring, Bluetooth device connection, Energy storage management, Smart lifestyle integration, Remote energy solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is Mercury Diagnostic App free?

Mercury Diagnostic App is free to download, with no in-app purchases.

### Is Power Queen free?

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

### Which has better reviews, Mercury Diagnostic App or Power Queen?

Mercury Diagnostic App is rated higher. Mercury Diagnostic App averages 3.0 out of 5 from 1 ratings, while Power Queen averages 2.7 from 43 ratings.

### Do Mercury Diagnostic App or Power Queen have ads?

Neither Mercury Diagnostic App nor Power Queen shows ads.

### Which is updated more often, Mercury Diagnostic App or Power Queen?

Mercury Diagnostic App ships an update every 11 months, and Power Queen every 3 weeks. Most recently, Mercury Diagnostic App was updated on November 5, 2026 and Power Queen on October 30, 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.*