ENGINE SFC vs Maritime Converter Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ENGINE SFC
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CALCULATION OF MARINE ENGINE FUEL CONSUMPTION
Maritime Converter Pro
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Fast offline conversions for bridge, engine-room and cargo work. Maritime Converter Pro puts useful marine, pressure, fuel and engineering calculations in one focused app. FREE TOOLS • QNH and pressure: convert hPa, inHg, mbar, kPa, mmHg, psi, bar and atm. • QFE to QNH: estimate sea-level pressure from field pressure, elevation and temperature. • Bunker quantity: convert barrels or other volume units to mass using the density you enter, and convert mass back to volume. • Marine and engineering units: 24 searchable groups and 100+ units, including distance, speed, mass, volume, pressure, area, time, angles, temperature, power, flow, viscosity, torque and energy. • Sea time and ETA: calculate voyage time and estimated arrival from distance, speed and departure time. • Diesel density: estimate density at a different temperature and calculate mass from volume. • Stowage factor: convert m³/t and ft³/long ton, allow for broken stowage, and estimate cargo quantity from usable volume. BUILT FOR PRACTICAL WORK • Works offline after installation. • Clear input units and calculation results. • Quick access to QNH from the home screen. • No account is required for the free calculators. LIFETIME PRO One non-consumable purchase unlocks unlimited calculation history, favorites and result sharing. Every calculator listed above remains free. The App Store shows the final local price before purchase. IMPORTANT QFE-to-QNH and diesel-density results are estimates based on the values and assumptions shown in the app. They do not replace approved operational tables, instruments, cargo documents or professional procedures. Verify critical calculations against the standards required for your operation.
Screenshots
Verdict
The clearest difference is in-app purchases: ENGINE SFC at none against Maritime Converter Pro's 1. ENGINE SFC also leads on update cadence (daily vs every 6 weeks) and iOS requirement (15.2 vs 17.0). On price, ads 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
Both are free to download. Maritime Converter Pro sells 1 one-off in-app purchase. ENGINE SFC asks for nothing beyond the download.
ENGINE SFC ships an update daily, Maritime Converter Pro every 6 weeks. The most recent releases landed on September 30, 2026 and October 15, 2026 respectively.
| Parameter | ENGINE SFC | Maritime Converter Pro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleksii Nezhalskyi | Dmitriy Motorin |
In-app purchases
ENGINE SFC
No in-app purchases
Maritime Converter Pro
- Lifetime Pro$4.99
Questions
Is ENGINE SFC free?
Is Maritime Converter Pro free?
Do ENGINE SFC or Maritime Converter Pro have ads?
Which is updated more often, ENGINE SFC or Maritime Converter Pro?
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