# Engine Calc: Fuel & Slip — Marine tools for engineers

> Marine tools for engineers (iPhone/iPad app by Stanislav Soroka.)

- Source: https://appshunter.io/ios/app/engine-calc-fuel-and-slip/id6745450059 (this page in markdown: same URL + `.md`)
- Developer: [Stanislav Soroka](https://appshunter.io/developer/1701402639)
- Category: Education
- Price: $24.99
- Age rating: 4+
- Requires: iOS 14.0 · 33 MB
- Languages: American English
- Released: 2025-06-15
- Data updated: 2026-07-20
- User reviews in markdown: https://appshunter.io/ios/app/engine-calc-fuel-and-slip/id6745450059/reviews.md

## What is Engine Calc?

Engine Calculators is a technical tool designed for marine engineers and engine room personnel. The application includes a set of calculators frequently used in shipboard operations for fuel management, engine performance, and unit conversion.

Included calculators:


- Oil Calculator
Manual and automatic calculation of oil quantities on board. Allows setup of tanks and tank tables for fast and accurate results by tank.


- Main Engine Power Calculator
Calculates main engine power output based on entered engine parameters.


- Slip Calculator
Calculates the slip of the ship’s propeller — the difference between the theoretical speed (if the propeller were moving through a solid medium) and the actual vessel speed.


- Unit Converter
Converts values across various engineering and maritime units, including stowage factor, volume, length, speed, and temperature.


Features:

- Works fully offline, suitable for use in engine rooms and at sea.
- Google Drive backup available for Oil Calculator data, allowing easy recovery on a different device.
- Supports both light and dark themes.
- Focused interface with clear input/output for practical use during daily operations.


The app is built to support daily tasks related to fuel monitoring, power estimation, and performance tracking aboard marine vessels. All tools are designed for quick access and reliability in real-world shipboard conditions


## Version history (last 2 releases)

### 1.0.2 — 2025-09-23

Ver. 1.0.2
1. Updated contact details for better communication
2. Improved in-app message submission form for faster and easier support
Stay tuned for more improvements!

### 1.0.1 — 2025-06-15

No release notes.

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## More apps by Stanislav Soroka

- [Marine Survey Pro](https://appshunter.io/ios/app/marine-survey-pro/id6458737068)
- [Marine Survey Assistant](https://appshunter.io/ios/app/marine-survey-assistant/id6475769290)
- [Українці в Греції](https://appshunter.io/ios/app/id6503212247)
- [Bridge Calc: Draft & Ballast](https://appshunter.io/ios/app/bridge-calc-draft-and-ballast/id6745449412)
- [ETA Calculator](https://appshunter.io/ios/app/eta-calculator/id6747178906)

All apps by Stanislav Soroka: https://appshunter.io/developer/1701402639

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-20.*