Comparison

Engine Room Simulator vs Sailor Decoded

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

Head to head
About

Engine Room Simulator

This app offers a high-fidelity simulation for marine engineering training. It allows users to practice shipboard engine-room procedures, from safety training to full voyage simulation, with clear guidance and feedback. Ideal for cadets, students, and seafarers to build practical skills anytime, anywhere.

Highlights
  • High-fidelity marine engineering simulation
  • PPE safety training and induction
  • Generator synchronization and startup
  • Full voyage simulation
  • Guided and assessment learning modes
  • Offline practice capability
Features
Read full description

Engine Room Simulator - ERS is a high-fidelity marine engineering training simulator for marine cadets, marine students, seafarers, and seamen who want to practice shipboard engine-room procedures with professional precision - anytime, anywhere, on mobile. Step into a realistic engine room and learn how a ship's machinery comes to life. From PPE safety training to generator synchronization to full voyage simulation, ERS turns complex marine engineering operations into repeatable, hands-on practice and onboard familiarization. MARITIME TRAINING, STEP BY STEP Work through guided engine room training modules with clear procedures, on-screen guidance, and instant feedback. This interactive training simulator builds from the fundamentals to full-plant operation - ideal for maritime education, competency training, and seafarer training. Practice the core shipboard systems: - PPE safety training and engine room safety induction - Emergency diesel generator cold-ship startup - Diesel Generator 1 and 2 starting - Diesel generator synchronization and paralleling - Seawater system and central seawater distribution - Freshwater system and cooling water system (LT/HT) - Lube oil system management - Fuel oil system pretreatment and service - Starting air system compressors and receivers - Boiler and steam plant operation - Marine diesel engine and engine startup training - Secure propulsion and propulsion control FULL VOYAGE SIMULATION Bring it all together in the Voyage Simulation hub - a connected engine room sandbox where shipboard systems and marine auxiliary systems operate at the same time. Perform system alignment training, manage the plant, handle electrical interlocks, and run the vessel like a real watchkeeping marine engineer. SAFETY FIRST, EVERY TIME Shipboard safety is built in. Complete your PPE and safety checks to unlock training modules, then gear up again every time you enter the engine room - just like real shipboard discipline. GUIDED AND ASSESSMENT LEARNING - Guided mode: a step-by-step narrator, on-screen pointers, and input gating help you learn each procedure correctly. - Assessment mode: an operations assessment with scoring and mistake tracking, unlocked once you complete the guided walkthrough. WHY ENGINE ROOM SIMULATOR - Built for marine cadets, marine engineering students, and working seafarers - Realistic P&ID-style shipboard system diagrams with pan and zoom - Authentic engine room operations, alarms, and trainer feedback - Premium, distraction-free full-screen interface - Practice marine engineering offline, on your own schedule - Repeatable drills and simulator practice to build muscle memory before you board Whether you are preparing for sea time, studying as a marine cadet, refreshing watchkeeping skills, or learning how a ship engine works, Engine Room Simulator - ERS is a complete marine simulator and ship systems simulator that gives you a safe, hands-on environment to learn, practice, and master engine room operations. ERS PRO Unlock the full marine engineering training experience, including all system modules and the complete Voyage Simulation, with ERS Pro. A yearly subscription and a one-time lifetime purchase are available. PRO OPTIONS • Pro Yearly: 1 year, auto-renewable subscription • Pro Lifetime: one-time purchase • Pro unlocks unlimited local saves and Pro-only features/components SUBSCRIPTION TERMS • Price is shown in your local currency before purchase • Payment is charged to your Apple ID at confirmation • Yearly Pro renews automatically unless canceled at least 24 hours before the end of the current period • Manage or cancel anytime in Apple ID account settings Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://electrosim.simlearningtech.com/privacy-policy

About

Sailor Decoded

An educational platform for seafarers to deepen their maritime knowledge. It provides expert-led courses, video lectures, and practice tests to prepare users for exams and enhance their skills.

Highlights
  • Expert-led courses
  • Learning bundles
  • Video lectures
  • Practice tests
  • Exam preparation
Features
Read full description

Merchant Navy Decoded is an educational platform designed for aspiring and professional seafarers to enhance their maritime knowledge and skills. The app offers expert-led courses, learning bundles, and video lectures covering various maritime topics. Users can also take practice tests and test series to evaluate their understanding and prepare for exams.

Screenshots

Engine Room Simulator4 screens
Sailor Decoded4 screens

Verdict

The call

The clearest difference is update cadence: Engine Room Simulator at every 3 weeks against Sailor Decoded's every 2 months. 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. Engine Room Simulator sells 2 in-app purchases, starting at $9.99 per year and Sailor Decoded sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Engine Room Simulator ships an update every 3 weeks, Sailor Decoded every 2 months. The most recent releases landed on October 7, 2026 and September 22, 2026 respectively.

Scorecard1 real difference · 9 level
Engine Room Simulator versus Sailor Decoded: the parameters behind the verdict, then further details
ParameterEngine Room SimulatorSailor Decoded
PriceFreeFree
Rating4.8 (4 ratings) — better—
Positive reviews—0.0% of reviews
Number of ratings4 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size174 MB83 MB
Age rating4+4+
DeveloperLouie JueraPraneet Mehta

Customer experience

Engine Room Simulator

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Sailor Decoded

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

2 purchases

Engine Room Simulator

Subscriptions1
  • ERS Pro Yearly3 Days trial$9.991 Year
One-time1
  • ERS Pro Lifetime$19.99
10 purchases

Sailor Decoded

One-time10
  • GP Rating Achiever$19.99
  • COLREG- A Complete Guide...$24.99
  • GP RATING EXCELLENCE PACKAGE$29.99
Show 7 more
  • Deck Cadet Package$59.99
  • MEO CLASS 1 PACKAGE$59.99
  • B.Tech Marine Engineering Campus...$59.99
  • MEO CLASS 2 EXCELLENCE PACKAGE$59.99
  • ETO ASPIRANT EXCELLENCE PACKAGE$59.99
  • ETO COC EXCELLENCE PACKAGE$59.99
  • MEO CLASS 4 PACKAGE$59.99

Questions

Is Engine Room Simulator free?
Engine Room Simulator is free to download, with in-app purchases available.
Is Sailor Decoded free?
Sailor Decoded is free to download, with in-app purchases available.
Do Engine Room Simulator or Sailor Decoded have ads?
Neither Engine Room Simulator nor Sailor Decoded shows ads.
Which is updated more often, Engine Room Simulator or Sailor Decoded?
Engine Room Simulator ships an update every 3 weeks, and Sailor Decoded every 2 months. Most recently, Engine Room Simulator was updated on October 7, 2026 and Sailor Decoded on September 22, 2026.

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