# Machine Train Alignment vs Tank Volume Calculator A1 PRO

The clearest difference is in-app purchases: Machine Train Alignment at none against Tank Volume Calculator A1 PRO's 1. Tank Volume Calculator A1 PRO's advantage is update cadence (daily vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Tank Volume Calculator A1 PRO sells 1 one-off in-app purchase. Machine Train Alignment asks for nothing beyond the download.

Machine Train Alignment ships an update every 10 months, Tank Volume Calculator A1 PRO daily. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Machine Train Alignment | Tank Volume Calculator A1 PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/machine-train-alignment/id6742226565/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Daily** |
| Monetization | Free | — |
| Size | 124 MB | 28 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## What reviewers say

### Machine Train Alignment

[App page](https://appshunter.io/ios/app/machine-train-alignment/id6742226565)

This app guides users through machine train shaft alignment using Bluetooth-connected sensors. It offers an adaptive interface and a VertiZontal™ feature for simultaneous vertical and horizontal adjustments. Generate instant PDF reports for on-site documentation.

**Highlights:** Bluetooth connectivity, Adaptive user interface, VertiZontal™ adjustment, Instant PDF reporting, Guided measurement process

**Features:** macOS Compatibility

**In-app purchases:** none


### Tank Volume Calculator A1 PRO

[App page](https://appshunter.io/ios/app/tank-volume-calculator-a1-pro/id6759477456)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tank Volume Pro | $2.99 | one-time |


## Frequently asked questions

### Is Machine Train Alignment free?

Machine Train Alignment is free to download, with no in-app purchases.

### Is Tank Volume Calculator A1 PRO free?

Tank Volume Calculator A1 PRO is free to download, with in-app purchases available.

### Do Machine Train Alignment or Tank Volume Calculator A1 PRO have ads?

Neither Machine Train Alignment nor Tank Volume Calculator A1 PRO shows ads.

### Which is updated more often, Machine Train Alignment or Tank Volume Calculator A1 PRO?

Machine Train Alignment ships an update every 10 months, and Tank Volume Calculator A1 PRO daily. Most recently, Machine Train Alignment was updated on September 17, 2026 and Tank Volume Calculator A1 PRO on September 24, 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.*