Comparison

Seafarer Documents Manager 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

Seafarer Documents Manager

Features
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Seafarer Documents Manager: Your Digital Document Navigator Tired of missing crucial certificate expiry dates? Designed specifically for officers and ratings, Seafarer Documents Manager is an indispensable tool for organizing, tracking, and managing all your maritime documents, certificates, and passports. Take complete control of your career, whether you are onboard or ashore. Key Features for Seafarers Smart Expiry Tracking Add issue and expiration dates for every certificate such as STCW, Medical, GMDSS, and Passport. Receive automatic reminders in advance, three months, one month, and one week before expiry, so you always have time to renew or reissue your documents. A clear visual status indicator shows at a glance which documents are valid and which require attention. Digital Document Organizer Create digital copies of your documents as photos or scans and store them offline directly in the app. Scan paper documents with your camera and save them as compact PDF files. Categorize everything by type, such as License, Endorsement, or Training Certificate, for quick retrieval. Preview your files inside the app at any time. Strong Privacy and Protection Keep your personal data safe with a PIN code or biometrics such as Face ID and Touch ID. Your documents stay on your device, available even without an internet connection. Sea Service Record Keep a complete record of your contracts and vessels, including position, vessel type, sign on and sign off dates, and attach the related documents to each entry. Professional CV in Two Taps Generate a polished maritime CV from your saved data and choose from several professional designs. Each CV includes a contact QR code, so a recruiter can save your details to their phone instantly. Export and share your CV in seconds. Created by a Seafarer, for Seafarers Add your own custom documents to match your specific needs. The app is available in multiple languages. As a professional seafarer, you know how critical it is to have up to date documents at boarding time and during an audit. This app removes the risk of human error and gives you peace of mind. Do not let expired certificates get you rejected. Download Seafarer Documents Manager today and take control of your maritime career. More useful features are coming in future updates. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sdm.kuka-lab.com/privacy-policy.php Terms of Service: https://sdm.kuka-lab.com/terms-of-service.php

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

Seafarer Documents Manager4 screens
Maritime Master4 screens

Verdict

The call

The clearest difference is update cadence: Maritime Master at daily against Seafarer Documents Manager's fortnightly. On price, ads, in-app purchases and device support 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. Seafarer Documents Manager sells 2 in-app purchases, starting at $0.99 per month and Maritime Master sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Seafarer Documents Manager ships an update fortnightly, Maritime Master daily. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

Scorecard1 real difference · 9 level
Seafarer Documents Manager versus Maritime Master: the parameters behind the verdict, then further details
ParameterSeafarer Documents ManagerMaritime Master
PriceFreeFree
Rating—3.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyFortnightlyDaily — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size66 MB7 MB
Age rating4+9+
DeveloperMykhaylo OsypovMARITIME MASTER LIMITED

In-app purchases

2 purchases

Seafarer Documents Manager

Subscriptions1
  • Monthly Subscribe$0.991 Month
One-time1
  • Seafarer Documents Manager Premium$11.99
1 purchases

Maritime Master

One-time1
  • CalcDeck Pro$14.99

Questions

Is Seafarer Documents Manager free?
Seafarer Documents Manager is free to download, with in-app purchases available.
Is Maritime Master free?
Maritime Master is free to download, with in-app purchases available.
Do Seafarer Documents Manager or Maritime Master have ads?
Neither Seafarer Documents Manager nor Maritime Master shows ads.
Which is updated more often, Seafarer Documents Manager or Maritime Master?
Seafarer Documents Manager ships an update fortnightly, and Maritime Master daily. Most recently, Seafarer Documents Manager was updated on October 3, 2026 and Maritime Master on October 19, 2026.

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