# Engine Programme vs Oilcalcs

The clearest difference is price: Engine Programme at Free against Oilcalcs's $9.99. Engine Programme also leads on rating (5.0 vs 4.8). Oilcalcs's advantage is ratings volume (46 vs 1) and iOS requirement (15.6 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

Engine Programme is free to download; Oilcalcs costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Engine Programme holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Oilcalcs has 46 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Engine Programme | Oilcalcs |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/engine-programme/id606123806/reviews)** | [4.8 (46 ratings)](https://appshunter.io/ios/app/oilcalcs/id612283154/reviews) |
| Number of ratings | 1 | **46** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 6 MB | 2 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Everllence SE](https://appshunter.io/developer/588307672) | [ron mooring](https://appshunter.io/developer/612283157) |

## What reviewers say

### Engine Programme

[App page](https://appshunter.io/ios/app/engine-programme/id606123806)

This professional planning tool assists marine professionals in selecting ship engines by providing detailed technical specifications and fuel consumption data. It supports comparisons for a wide range of engine types, including advanced technologies for current and future emissions standards.

**Highlights:** Engine selection support, Detailed fuel consumption data, Engine layout diagrams, Technical specifications, Comparison of engine configurations, Support for modern engine technologies

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Oilcalcs

[App page](https://appshunter.io/ios/app/oilcalcs/id612283154)

This app provides comprehensive calculations for professionals in the oil and gas industry. It offers versatile tools for volume and weight conversions, density corrections, and blending calculations, supporting various industry tables and units.

**Highlights:** Volume and weight conversions, Density correction for special applications, Viscosity, pour point, and flash point blender, LNG and LPG density calculators, Support for ASTM tables and units, Data export to database

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Engine Programme free?

Engine Programme is free to download, with no in-app purchases.

### Is Oilcalcs free?

Oilcalcs costs $9.99, with no in-app purchases.

### Which has better reviews, Engine Programme or Oilcalcs?

Engine Programme is rated higher. Engine Programme averages 5.0 out of 5 from 1 ratings, while Oilcalcs averages 4.8 from 46 ratings.

### Do Engine Programme or Oilcalcs have ads?

Neither Engine Programme nor Oilcalcs shows ads.

### Which is updated more often, Engine Programme or Oilcalcs?

Engine Programme ships an update every 4 months, and Oilcalcs every 4 months. Most recently, Engine Programme was updated on September 21, 2026 and Oilcalcs on September 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*