Comparison

Mercury Diagnostic App vs Authenticator App

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
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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

Authenticator App

This app generates verification codes for two-factor and multi-factor authentication. It offers a secure, offline experience with no data collection or ads, serving as a robust alternative to other authenticator apps.

Highlights
  • Fully offline operation
  • Private key storage
  • Zero data collection
  • Import accounts from Google Authenticator
  • Scan QR codes or enter keys manually
  • Instant code refresh with previews
  • Bulk export options
Features
Read full description

TwoAuth is a clean, secure and fully offline authenticator that generates verification codes for two-factor (2FA) and multi-factor (MFA) authentication — a drop-in replacement for Google Authenticator and Microsoft Authenticator. WHY TWOAUTH • Fully offline: no sign-up, no servers, ever • Keys stay private: secrets are stored only in the local system Keychain and never uploaded • Zero data collection: no ads, no analytics, no third-party SDKs • Standards-based: a faithful implementation of RFC 4226 (HOTP) and RFC 6238 (TOTP), compatible with every website, enterprise system and service that supports two-factor or multi-factor authentication MOVE IN SECONDS • Scan the "Transfer accounts" QR codes from Google Authenticator to import everything at once • Add accounts by scanning a website QR code, reading a QR code from your photo library, or entering the secret key manually BUILT FOR SPEED • All codes on one screen, refreshed at the same instant • Codes flash red for the final 5 seconds, with the next code previewed and ready to copy • Tap a card to copy; pin favorites to the top • Brand logos for well-known services help you find accounts at a glance, with manual icon override BACKUP & TRANSFER • Bulk export as migration QR codes (Google Authenticator compatible) • Bulk export as a JSON file • Export any single account as a standard otpauth QR code THE DETAILS • Light / dark themes — follow the system or set your own • English, Simplified Chinese and Traditional Chinese • SHA1 / SHA256 / SHA512, 6–8 digit codes, custom periods and counters IMPORTANT Before deleting an account, disable two-factor authentication on the website or switch to another authenticator first, or you may be locked out.

Screenshots

Mercury Diagnostic App3 screens
Authenticator App4 screens

Verdict

The call

The clearest difference is rating: Authenticator App at 5.0 against Mercury Diagnostic App's 3.0. Authenticator App also leads on update cadence (every 5 days vs every 11 months). Mercury Diagnostic App's advantage is iOS requirement (10.0 vs 16.0). On price, ratings volume, ads and in-app purchases 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

Authenticator App holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Mercury Diagnostic App ships an update every 11 months, Authenticator App every 5 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 7 level
Mercury Diagnostic App versus Authenticator App: the parameters behind the verdict, then further details
ParameterMercury Diagnostic AppAuthenticator App
PriceFreeFree
Rating3.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings11
Update frequencyEvery 11 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, Mac
Requires iOS10.0 — better16.0
Further details — not scored
Size73 MB3 MB
Age rating4+4+
DeveloperMercury Marine LLCHangzhou JoyTime Technology Co., Ltd.

Customer experience

Mercury Diagnostic App

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

Authenticator App

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Mercury Diagnostic App

No in-app purchases

None

Authenticator App

No in-app purchases

Questions

Is Mercury Diagnostic App free?
Mercury Diagnostic App is free to download, with no in-app purchases.
Is Authenticator App free?
Authenticator App is free to download, with no in-app purchases.
Which has better reviews, Mercury Diagnostic App or Authenticator App?
Authenticator App is rated higher. Mercury Diagnostic App averages 3.0 out of 5 from 1 ratings, while Authenticator App averages 5.0 from 1 ratings.
Do Mercury Diagnostic App or Authenticator App have ads?
Neither Mercury Diagnostic App nor Authenticator App shows ads.
Which is updated more often, Mercury Diagnostic App or Authenticator App?
Mercury Diagnostic App ships an update every 11 months, and Authenticator App every 5 days. Most recently, Mercury Diagnostic App was updated on November 5, 2026 and Authenticator App on November 6, 2026.

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