Comparison

Mercury Diagnostic App vs Power Queen

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Mercury Diagnostic App

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
Read full description

Mercury Marine’s Diagnostic App (MDA) enables Mercury dealer technicians to easily switch between VesselView Mobile rigged boats (or a module carried with them) throughout the day to do basic diagnostics on SmartCraft® engines with the phone in their pockets. MDA provides the ability to create custom data lists to view live engine data, obtain active faults, view runtime history, create reports, and more. The full functionality of the app is enabled with a license key obtained from Mercury Marine and works in conjunction with the Bluetooth Low Energy VesselView Mobile module. When the app is open and connected to your vessel it requires a continuous connection and therefore may impact the battery life of your device. Features: • View live SmartCraft® engine data and create custom data lists with: RPM, Battery Voltage, Engine Temperature, Engine Hours, Oil Temperature, Oil Pressure, Coolant Temperature, Sea Temperature and more! • View active fault and corresponding descriptive fault information • View engine hours and runtime history • Enter Maintenance records • Communicate wirelessly to SmartCraft® engines through a Bluetooth Low Energy connection and a connected VesselView Mobile module • Allows for normal phone operation – call, text, streaming music, search the web, etc. while connected to a Mercury Marine SmartCraft® engine ************ IMPORTANT INFORMATION ************************* • MDA is limited to use by Mercury Marine Dealers. A software license key is required to use this app. • MDA is designed to work with the VesselView Mobile module that may already be rigged on a boat, or may be purchased through your dealership or through a link inside the app. A firmware update to the VesselView Mobile module may be required to use MDA. *Requires version 1.0.3 firmware or later. • The VesselView Mobile module works with SmartCraft® capable engines built since 2003 (40HP and up). One to four engines can be viewed simultaneously. • The VesselView Mobile module simply connects to a SmartCraft® connector located either at the helm or on the engine. • Continued use of GPS running in the background can dramatically decrease battery life.

About

Power Queen

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
Read full description

Power Queen, your perfect companion for smart living! Through Bluetooth connection, we provide real-time monitoring and management for your energy storage battery devices, helping you achieve a smart lifestyle. No matter where you are, Power Queen can provide you with reliable energy management solutions, making your life more convenient and efficient.

Screenshots

Mercury Diagnostic App3 screens
Power Queen4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Mercury Diagnostic App versus Power Queen: the parameters behind the verdict, then further details
ParameterMercury Diagnostic AppPower Queen
PriceFreeFree
Rating3.0 (1 ratings) — better2.7 (43 ratings)
Positive reviews—24.5% of reviews
Number of ratings143 — better
Update frequencyEvery 11 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better13.0
Further details — not scored
Size73 MB47 MB
Age rating4+17+
DeveloperMercury Marine LLCShenzhen Lizu Shidai Technology

Customer experience

Mercury Diagnostic App

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

Power Queen

All ratings41 ratings
Positive36.6%
Neutral9.8%
Negative53.7%
Written reviews53 reviews
Positive24.5%
Neutral5.7%
Negative69.8%

In-app purchases

None

Mercury Diagnostic App

No in-app purchases

None

Power Queen

No in-app purchases

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.

Other comparisons