# Bunker One vs ASTM PRO

The clearest difference is price: Bunker One at Free against ASTM PRO's $14.99. Bunker One also leads on rating (4.5 vs 1.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Bunker One is free to download; ASTM PRO costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bunker One holds the better App Store score, 4.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Bunker One | ASTM PRO |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/bunker-one/id439589227/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/astm-pro/id6502639446/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | **Free** | Paid |
| Size | 16 MB | 1 MB |
| Requires iOS | 15.6 | **15.2** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Askapps](https://appshunter.io/developer/434706041) | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) |

## What reviewers say

### Bunker One

[App page](https://appshunter.io/ios/app/bunker-one/id439589227)

This app provides a suite of calculators for marine fuel standards, including CCAI, Cetan Index, and blending calculations. It supports ISO 8217 and ASTM standards, with all inputs and outputs in SI units. Users can also access news and updates from the developer.

**Highlights:** ISO 8217 fuel standard lookup, CCAI Number calculation, Cetan Index calculation (old & new methods), Fuel blending calculators (viscosity, sulphur), Injection temperature calculation, Energy and price relation calculations, News updates from developer

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

**In-app purchases:** none


### ASTM PRO

[App page](https://appshunter.io/ios/app/astm-pro/id6502639446)

This application provides standardized tables for calculating petroleum quantities. It's designed for marine engineers and officers to ensure consistent measurements regardless of origin or units used.

**Highlights:** Standardized petroleum quantity calculation, Reference condition calculations, Supports multiple measurement systems, Applicable to crude oil and petroleum products, Designed for marine engineers

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

**In-app purchases:** none


## Frequently asked questions

### Is Bunker One free?

Bunker One is free to download, with no in-app purchases.

### Is ASTM PRO free?

ASTM PRO costs $14.99, with no in-app purchases.

### Which has better reviews, Bunker One or ASTM PRO?

Bunker One is rated higher. Bunker One averages 4.5 out of 5 from 2 ratings, while ASTM PRO averages 1.0 from 1 ratings.

### Do Bunker One or ASTM PRO have ads?

Neither Bunker One nor ASTM PRO shows ads.

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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.*