Comparison

Bunker One vs Scanmar Crew Mobile

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

Head to head
About

Bunker One

This app provides a suite of calculators for marine fuel standards, including CCAI, Cetan Index, and blending calculations. It supports ISO 8217 and ASTM standards, with all inputs and outputs in SI units. Users can also access news and updates from the developer.

Highlights
  • ISO 8217 fuel standard lookup
  • CCAI Number calculation
  • Cetan Index calculation (old & new methods)
  • Fuel blending calculators (viscosity, sulphur)
  • Injection temperature calculation
  • Energy and price relation calculations
  • News updates from developer
Features
Read full description

This application by Bunker One, is a small practicable tool for look up the ISO 8217 - 2005, 2010/2012, 2017 & 2024 standards for residual- and distillate marine fuels. Programmed calculators are included for different fuel related calculations. Calculators programmed as below.: -CCAI Number according ISO 8217 -Cetan Index ASTM - D 976 - 80 (old method) ASTM - D 4737 - 87 (new method) -Deviation calculations according Bunker One -Energy and price relations according Bunker One -Fuel Blending - Viscosity blending according ASTM - D 7152 Sulphur blending according Bunker One -Injection temperature according Bunker One -Reproducibility -Specific Energy gross and net content according ISO 8217 -Viscosity Index according ASTM - D 341 -Volume Correction Factor according ASTM D1250-80 Table 5B General for all calculators is that all entries shall be in SI units. And results also given in SI units. Where there is a differentiation between Distillates and Residual fuels, distillates are defined with density lower than 900 kg/m3 Where there is a differentiation between Straight Run fuel and Cracked fuels, straight run fuels are defined with density lower than 950 kg/m3 News published on our web page Bunkerone.com will be pushed to the app holders and publish with link to the web under the "news" bar

About

Scanmar Crew Mobile

Features
Read full description

Scanmar Crew is the complete mobile solution for maritime professionals to manage their career, credentials, and communications with their crewing agency. Stay organized and job-ready with instant access to your professional profile, certifications, and critical documents - all from your mobile device. Key Features: Profile Management - Update personal information, contact details, emergency contacts, and addresses on the go. Document Center - Upload, view, and track expiry dates for certifications, licenses, and credentials with automatic alerts for documents nearing expiration. Sea Service Records - Access and maintain your complete sea service history. Payroll Access - View and download payroll statements and wage information. Messaging - Direct communication with your crewing agency and fleet management. Schedule Management - View assignments, rotations, and important dates. Principal Corner - Access information and updates from your current principal/employer. Document Alerts - Get notified when documents are expired, near expiry, or pending approval. Cash Advance - Request a cash advance directly from your device with secure photo verification, and track its approval status in real time. Reimbursement - Submit reimbursement requests with supporting details and follow each request through to approval.

Screenshots

Bunker One4 screens
Scanmar Crew Mobile4 screens

Verdict

The call

Bunker One and Scanmar Crew Mobile are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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.

UpkeepUpdate frequency

Bunker One ships an update every 3 months, Scanmar Crew Mobile every 2 months. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
Bunker One versus Scanmar Crew Mobile: the parameters behind the verdict, then further details
ParameterBunker OneScanmar Crew Mobile
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.5 — better
Further details — not scored
Size16 MB112 MB
Age rating4+4+
DeveloperAskappsScanmar Maritime Services, Inc.

In-app purchases

None

Bunker One

No in-app purchases

None

Scanmar Crew Mobile

No in-app purchases

Questions

Is Bunker One free?
Bunker One is free to download, with no in-app purchases.
Is Scanmar Crew Mobile free?
Scanmar Crew Mobile is free to download, with no in-app purchases.
Do Bunker One or Scanmar Crew Mobile have ads?
Neither Bunker One nor Scanmar Crew Mobile shows ads.
Which is updated more often, Bunker One or Scanmar Crew Mobile?
Bunker One ships an update every 3 months, and Scanmar Crew Mobile every 2 months. Most recently, Bunker One was updated on October 23, 2026 and Scanmar Crew Mobile on October 30, 2026.

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