Comparison

Tanker vs ENGINE SFC

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

Head to head
About

Tanker

This app streamlines the process of calculating marine fuel tank volumes. It eliminates the need for physical sounding tables and manual calculations, providing instant volume lookups with trim corrections automatically applied. Users can manage target fill levels, track fuel transfers, and share tables with their fleet.

Highlights
  • Instant volume lookups
  • Target fill level setting
  • CSV import and tank duplication
  • Unit conversion and safe fill percentages
  • Bunkering mode for real-time tracking
  • Offline functionality
  • Cloud sharing via TankerBase
Features
Read full description

Tanker - Marine Fuel Tank Calculator Stop thumbing through dirty sounding table binders. Get instant tank volumes. Every chief engineer knows the routine: sound the tanks, walk back to the control room, dig out the crusty binder, flip through pages for each tank, look up trim corrections, punch numbers into a calculator. Tanker cuts this 20-minute process down to 2 minutes. The Old Way vs. The Tanker Way Old: Drop tape → Record height → Walk to control room → Find binder → Flip pages → Look up trim → Find volume → Repeat for each tank → Add on calculator Tanker: Drop tape → Tap tank → Enter sounding → Get instant volume → Done How It Works Build your vessel's sounding tables once using CSV import, the Express Editor, or by duplicating similar tanks. Select your vessel, tap a tank, enter your sounding—instant volume lookup with trim automatically applied. Sound all your tanks, hit the equals button, get your total. Features That Save Time - Instant Volume Lookups - No more flipping through binder pages - Target Fill Levels - Set specific fill preferences per tank to maintain vessel stability - Multiple Build Methods - CSV import, Express Editor, tank duplication - Smart Tools Built In - Unit conversion, safe fill percentages, sounding history with trends - Bunkering Mode - Track fuel transfers in real-time with target level warnings - Works Offline - All calculations on-device, no internet needed - Share Tables - AirDrop to crew or publish to TankerBase for the whole fleet Maintain Stability During Transfers Set target fill levels for each tank based on your vessel's stability requirements. During bunkering, Tanker warns you when approaching target levels—keeping your vessel balanced without mental math or paper notes. TankerBase: Cloud Sharing Create an account to share your sounding tables online. Share peer-to-peer with your relief engineer or publish your tables to our database for anyone to subscribe to. Build once, share with your entire fleet. Built by Engineers, For Engineers Tanker was created by a chief engineer who got tired of the sounding table binder routine. If you've ever stood in an engine room covered in fuel oil trying to find the right page in a beat-up binder, this app is for you. Download Tanker and leave the binder in the drawer. Subscription Details Yearly Plan: $19.99/year Lifetime Plan: $59.99 (best value) Payment is charged to your Apple Account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before renewal. Manage or cancel anytime in your App Store account settings. Subscription Terms: https://www.seasmith.net/tanker-subscription-terms/ Privacy Policy: https://www.seasmith.net/tanker-privacy Terms of Use: https://www.seasmith.net/tanker-terms

About

ENGINE SFC

Features
Read full description

CALCULATION OF MARINE ENGINE FUEL CONSUMPTION

Screenshots

Tanker4 screens
ENGINE SFC1 screens

Verdict

The call

The clearest difference is in-app purchases: ENGINE SFC at none against Tanker's 2. ENGINE SFC also leads on update cadence (daily vs every 2 weeks) and iOS requirement (15.2 vs 26.1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tanker sells 2 one-off in-app purchases. ENGINE SFC asks for nothing beyond the download.

UpkeepUpdate frequency

Tanker ships an update every 2 weeks, ENGINE SFC daily. The most recent releases landed on June 22, 2026 and September 11, 2026 respectively.

Scorecard3 real differences · 6 level
Tanker versus ENGINE SFC: the parameters behind the verdict, then further details
ParameterTankerENGINE SFC
PriceFreeFree
Rating5.0 (1 ratings) — better
Number of ratings1 — better
Update frequencyEvery 2 weeksDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.115.2 — better
Further details — not scored
Size14 MB6 MB
Age rating4+4+
DeveloperPearson SmithOleksii Nezhalskyi

In-app purchases

2 purchases

Tanker

One-time2
  • Full Version$4.99
  • Tanker Pro Lifetime$59.99
None

ENGINE SFC

No in-app purchases

Questions

Is Tanker free?
Tanker is free to download, with in-app purchases available.
Is ENGINE SFC free?
ENGINE SFC is free to download, with no in-app purchases.
Do Tanker or ENGINE SFC have ads?
Neither Tanker nor ENGINE SFC shows ads.
Which is updated more often, Tanker or ENGINE SFC?
Tanker ships an update every 2 weeks, and ENGINE SFC daily. Most recently, Tanker was updated on June 22, 2026 and ENGINE SFC on September 11, 2026.

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