Comparison

Volvo Penta Connect vs Maritime Master

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

Head to head
About

Volvo Penta Connect

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Volvo Penta Connect With Volvo Penta Connect, unit owners can create an account, register their engines, and access essential services and product information. Owners can build and manage fleets, share data with selected users, and streamline operations. KEY FEATURES (Industrial & Marine) • Register (owned) Volvo Penta products • Warranty status – Check coverage details • Campaigns – View outstanding campaigns • Service history – Access Online Service Protocols • Manuals & Handbooks – Always at your fingertips • Technical specifications – Detailed product data • Shop for parts – Find parts related to your unit • Administration – Organize assets, assign and manage roles INDUSTRIAL SPECIFIC FEATURES When your machine is connected via a Volvo Penta connectivity device, you unlock additional services. The following features require a Volvo Penta Telematics Gateway (TGW3): • Dashboard – Connected insights, fault codes, productivity data, and more • Remote Software Updates - Perform campaign updates directly from the app • Custom Notifications – Choose push notifications, SMS, and/or email for update alerts • History Ledger – Track all software updates with success/failure statistics If your machine is not connected, contact your Volvo Penta dealer to learn more and to get started. MARINE CONNECTIVITY Looking for marine connectivity? If you have Easy Connect hardware installed in your boat, download the Volvo Penta Easy Connect app or talk to your dealer to get started.

About

Maritime Master

This app provides a comprehensive suite of 88 professional maritime calculators for navigation, celestial observation, tides, stability, weather, engineering, and more. It's designed for maritime professionals and enthusiasts, offering offline functionality and citing all formulas with their official sources.

Highlights
  • 88 professional maritime calculators
  • Offline functionality
  • Navigation calculations
  • Celestial observation tools
  • Stability and cargo calculations
  • Unit converters
Features
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CalcDeck is the complete calculation toolkit for life at sea. It brings 88 professional maritime calculators into one beautifully designed iOS app, covering navigation, celestial observation, tides, stability and cargo, weather, engineering, safety, commercial voyage work, yacht and small craft performance, regulatory compliance and unit conversion. Whether you are a Master Mariner, deck officer, marine engineer, maritime cadet, yacht skipper or weekend sailor, CalcDeck replaces a shelf of reference books, a scratch pad and a pocket full of single-purpose apps. Every formula is cited with its textbook or IMO source, so you can verify the working and trust the result. CalcDeck is built by Maritime Master, the team behind COLREG Master, Nav Lights and IALA Buoyage, and is engineered to the same professional standard trusted by cadets and officers worldwide. What is inside Navigation (12 calculators): great-circle and rhumb-line distance, course to steer, ETA, set and drift, three-point fix, running fix, dead reckoning, cross-track error, waypoint bearing, speed-time-distance, departure and DMP, Mercator sailing. Celestial (8 calculators): sight reduction, meridian passage, altitude corrections, sunrise, sunset and twilight times, Polaris latitude, compass error by amplitude, azimuth of the sun, and chronometer error. Tidal (6 calculators): tidal height by the rule of twelfths, secondary port corrections, tidal streams, height at a given time, time at a given height, and clearance under bridges. Stability and Cargo (9 calculators): GM and list, trim and draft survey, free surface correction, deadweight and displacement, cargo load, block coefficient, TPC and MCTC, and final draft after loading. Weather (6 calculators): true wind, apparent wind, relative humidity, dew point, Beaufort scale conversion, and barometric trend. Engineering (10 calculators): fuel consumption and ROB, daily fuel burn, propeller slip, shaft power, specific fuel consumption, bunker density correction, trim tank transfer, admiralty coefficient, engine load, and voyage fuel planning. Safety (5 calculators): distance off by vertical sextant angle, horizon distance, dipping range, turning circle, and stopping distance. Yacht and Small Craft (5 calculators): hull speed, sail area to displacement, displacement to length, capsize screening, and ballast ratio. Commercial and Voyage (6 calculators): voyage cost, laytime, demurrage, freight rate per tonne, charter economics, and port disbursements. Regulations and Compliance (6 calculators): MARPOL discharge limits, SOLAS LSA requirements, STCW rest-hour compliance, load line zones, ballast water exchange, and garbage record categorisation. Unit Converters (12 calculators, all free): distance, speed, temperature, pressure, volume, mass, area, power, energy, angle, time and fuel. Every unit a mariner needs. Why CalcDeck CalcDeck works fully offline, so there is no signal, no signup and no interruption when you need an answer at sea. It is a native SwiftUI app designed for iPhone and iPad on iOS 17 and later, with a clean navy and gold Maritime Master design, dark mode support, favourites, and a Calc Pad that lets you pin your most-used tools for instant access on watch. There are no advertisements, no tracking and no subscriptions. Free and Pro You can try CalcDeck at no cost. All 12 unit converters and a selection of essential calculators in every professional category are included free. Unlock the full 85-calculator suite with a single one-time in-app purchase that is yours forever across all your devices. Who it is for CalcDeck is used by deck officers and Masters on coastal and ocean passages, by marine engineers calculating fuel, power and performance, by maritime cadets preparing for OOW, Chief Mate and Master examinations, by yacht skippers and RYA students, by cruising sailors, by pilots, harbourmasters and port operations staff, and by naval architects, surveyors and marine consultants.

Screenshots

Volvo Penta Connect4 screens
Maritime Master4 screens

Verdict

The call

The clearest difference is in-app purchases: Volvo Penta Connect at none against Maritime Master's 1. Maritime Master's advantage is update cadence (daily vs every 2 months). On price, ads, device support and iOS requirement 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. Maritime Master sells 1 one-off in-app purchase. Volvo Penta Connect asks for nothing beyond the download.

UpkeepUpdate frequency

Volvo Penta Connect ships an update every 2 months, Maritime Master daily. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Volvo Penta Connect versus Maritime Master: the parameters behind the verdict, then further details
ParameterVolvo Penta ConnectMaritime Master
PriceFreeFree
Rating—3.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better17.6
Further details — not scored
Size16 MB7 MB
Age rating4+9+
DeveloperAB Volvo PentaMARITIME MASTER LIMITED

In-app purchases

None

Volvo Penta Connect

No in-app purchases

1 purchases

Maritime Master

One-time1
  • CalcDeck Pro$14.99

Questions

Is Volvo Penta Connect free?
Volvo Penta Connect is free to download, with no in-app purchases.
Is Maritime Master free?
Maritime Master is free to download, with in-app purchases available.
Do Volvo Penta Connect or Maritime Master have ads?
Neither Volvo Penta Connect nor Maritime Master shows ads.
Which is updated more often, Volvo Penta Connect or Maritime Master?
Volvo Penta Connect ships an update every 2 months, and Maritime Master daily. Most recently, Volvo Penta Connect was updated on October 27, 2026 and Maritime Master on October 31, 2026.

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