# ASTM 54 B vs DRFT MRKS

The clearest difference is price: DRFT MRKS at Free against ASTM 54 B's $9.99. DRFT MRKS also leads on update cadence (monthly vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

DRFT MRKS is free to download; ASTM 54 B costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ASTM 54 B ships an update every 6 months, DRFT MRKS monthly. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ASTM 54 B | DRFT MRKS |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/drft-mrks/id6741070099/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 60 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) | [Tymor Marine Ltd](https://appshunter.io/developer/1769206109) |

## What reviewers say

### ASTM 54 B

[App page](https://appshunter.io/ios/app/astm-54-b/id6449903055)

This application calculates fuel weight for ships based on ASTM 54 B standards. Users input volume and observed temperature to receive precise calculations.

**Highlights:** ASTM 54 B fuel weight calculation, Input volume and temperature, Automatic calculation, User-friendly interface

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

**In-app purchases:** none


### DRFT MRKS

[App page](https://appshunter.io/ios/app/drft-mrks/id6741070099)

This application uses AI and deep learning to accurately measure a vessel's draft from a short HD video. It aims to provide a verifiable source of truth for calculating vessel displacement, improving accuracy in determining loaded cargo and equipment.

**Highlights:** AI/Deep Learning technology, Measures vessel draft from video, Improves draft reading accuracy, Verifiable source of truth, Calculates vessel displacement

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ASTM 54 B free?

ASTM 54 B costs $9.99, with no in-app purchases.

### Is DRFT MRKS free?

DRFT MRKS is free to download, with no in-app purchases.

### Do ASTM 54 B or DRFT MRKS have ads?

Neither ASTM 54 B nor DRFT MRKS shows ads.

### Which is updated more often, ASTM 54 B or DRFT MRKS?

ASTM 54 B ships an update every 6 months, and DRFT MRKS monthly. Most recently, ASTM 54 B was updated on October 24, 2026 and DRFT MRKS on October 20, 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.*