# Petroleum VCF Basic vs Ship Terminology (Tanker) 4U

The clearest difference is update cadence: Petroleum VCF Basic at every 2 months against Ship Terminology (Tanker) 4U's every 11 months. Ship Terminology (Tanker) 4U's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.1). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Petroleum VCF Basic ships an update every 2 months, Ship Terminology (Tanker) 4U every 11 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | Petroleum VCF Basic | Ship Terminology (Tanker) 4U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/petroleum-vcf-basic/id6475608625/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Free | — |
| Size | 2 MB | 172 MB |
| Requires iOS | 16.1 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jose Maldonado](https://appshunter.io/developer/1724473480) | [Alexey Kulchikovskiy](https://appshunter.io/developer/1707709414) |

## What reviewers say

### Petroleum VCF Basic

[App page](https://appshunter.io/ios/app/petroleum-vcf-basic/id6475608625)

Calculate volume and density changes for various petroleum products due to temperature and pressure variations. Supports crude oil, refined products, and specialized oils. Requires minimum density and temperature data, with optional volume input.

**Highlights:** Volume and density change calculations, Supports crude oil, refined products, and lube oils, Calculations based on temperature and pressure, Handles various density units, Optional volume input for corrected volume, Saves and recalls last performed calculation

**In-app purchases:** none


### Ship Terminology (Tanker) 4U

[App page](https://appshunter.io/ios/app/ship-terminology-tanker-4u/id6503001780)

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

**In-app purchases:** none


## Frequently asked questions

### Is Petroleum VCF Basic free?

Petroleum VCF Basic is free to download, with no in-app purchases.

### Is Ship Terminology (Tanker) 4U free?

Ship Terminology (Tanker) 4U is free to download, with no in-app purchases.

### Do Petroleum VCF Basic or Ship Terminology (Tanker) 4U have ads?

Neither Petroleum VCF Basic nor Ship Terminology (Tanker) 4U shows ads.

### Which is updated more often, Petroleum VCF Basic or Ship Terminology (Tanker) 4U?

Petroleum VCF Basic ships an update every 2 months, and Ship Terminology (Tanker) 4U every 11 months. Most recently, Petroleum VCF Basic was updated on November 4, 2026 and Ship Terminology (Tanker) 4U on November 4, 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.*