# Poly V Design vs Machine Train Alignment

The clearest difference is iOS requirement: Poly V Design at 11.0 against Machine Train Alignment's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Poly V Design ships an update every 15 months, Machine Train Alignment every 10 months. The most recent releases landed on September 14, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Poly V Design | Machine Train Alignment |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 10 months** |
| Monetization | — | Free |
| Size | 21 MB | 124 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUTCHINSON](https://appshunter.io/developer/862345826) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### Poly V Design

[App page](https://appshunter.io/ios/app/poly-v-design/id1153521116)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Poly V Design free?

Poly V Design is free to download, with no in-app purchases.

### Is Machine Train Alignment free?

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

### Do Poly V Design or Machine Train Alignment have ads?

Neither Poly V Design nor Machine Train Alignment shows ads.

### Which is updated more often, Poly V Design or Machine Train Alignment?

Poly V Design ships an update every 15 months, and Machine Train Alignment every 10 months. Most recently, Poly V Design was updated on September 14, 2026 and Machine Train Alignment on September 28, 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.*