# Petroleum Dictionary vs Petroleum VCF Basic

The clearest difference is rating: Petroleum VCF Basic at 5.0 against Petroleum Dictionary's 4.4. Petroleum VCF Basic also leads on in-app purchases (none vs 5) and ads (none vs shown). Petroleum Dictionary's advantage is ratings volume (9 vs 2) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Petroleum Dictionary sells 5 in-app purchases, starting at $1.99 per 7 days. Petroleum VCF Basic asks for nothing beyond the download.

Petroleum VCF Basic holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

Petroleum Dictionary ships an update every 9 months, Petroleum VCF Basic every 2 months. The most recent releases landed on September 12, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Petroleum Dictionary | Petroleum VCF Basic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (9 ratings)](https://appshunter.io/ios/app/petroleum-dictionary-offline/id1487805808/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/petroleum-vcf-basic/id6475608625/reviews)** |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 2 MB |
| Requires iOS | **15.6** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Puju Dekivadiya](https://appshunter.io/developer/1289574712) | [Jose Maldonado](https://appshunter.io/developer/1724473480) |

## What reviewers say

### Petroleum Dictionary

[App page](https://appshunter.io/ios/app/petroleum-dictionary-offline/id1487805808)

This app provides a comprehensive offline dictionary for petroleum engineering terms, including definitions, equations, formulas, and quizzes. It offers features like speech-to-text, text-to-speech, and the ability to save favorites and view search history. It's designed for students and professionals in the oil and gas industry.

**Highlights:** Offline access to over 5000 petroleum terms, Includes engineering equations and formulas, Interactive quizzes to test knowledge, Speech-to-text and text-to-speech functionality, Save favorite terms and view search history, Easy-to-use interface

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $1.99 | per 7 days |
| Monthly Pro Plan | $4.99 | per month |
| Yearly Pro Plan | $29.99 | per year |
| Remove Ads | $9.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### 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


## Frequently asked questions

### Is Petroleum Dictionary free?

Petroleum Dictionary is free to download, with in-app purchases available.

### Is Petroleum VCF Basic free?

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

### Which has better reviews, Petroleum Dictionary or Petroleum VCF Basic?

Petroleum VCF Basic is rated higher. Petroleum Dictionary averages 4.4 out of 5 from 9 ratings, while Petroleum VCF Basic averages 5.0 from 2 ratings.

### Do Petroleum Dictionary or Petroleum VCF Basic have ads?

Petroleum Dictionary shows ads; Petroleum VCF Basic does not.

### Which is updated more often, Petroleum Dictionary or Petroleum VCF Basic?

Petroleum Dictionary ships an update every 9 months, and Petroleum VCF Basic every 2 months. Most recently, Petroleum Dictionary was updated on September 12, 2026 and Petroleum VCF Basic on June 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.*