# SKF Machine train alignment vs ASTM 54 B

The clearest difference is price: SKF Machine train alignment at Free against ASTM 54 B's $9.99. SKF Machine train alignment also leads on update cadence (every 3 months vs every 6 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

SKF Machine train alignment 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.

SKF Machine train alignment ships an update every 3 months, ASTM 54 B every 6 months. The most recent releases landed on October 11, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SKF Machine train alignment | ASTM 54 B |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | — | Paid |
| Size | 69 MB | 1 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SKF](https://appshunter.io/developer/472922971) | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) |

## What reviewers say

### SKF Machine train alignment

[App page](https://appshunter.io/ios/app/skf-machine-train-alignment/id1149906003)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SKF Machine train alignment free?

SKF Machine train alignment is free to download, with no in-app purchases.

### Is ASTM 54 B free?

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

### Do SKF Machine train alignment or ASTM 54 B have ads?

Neither SKF Machine train alignment nor ASTM 54 B shows ads.

### Which is updated more often, SKF Machine train alignment or ASTM 54 B?

SKF Machine train alignment ships an update every 3 months, and ASTM 54 B every 6 months. Most recently, SKF Machine train alignment was updated on October 11, 2026 and ASTM 54 B on September 21, 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.*