# Vertical Shaft Alignment vs PDB ePTW+

Vertical Shaft Alignment and PDB ePTW+ are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Vertical Shaft Alignment ships an update every 6 months, PDB ePTW+ every 4 months. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Vertical Shaft Alignment | PDB ePTW+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 94 MB | 25 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Petroliam Nasional Berhad (PETRONAS)](https://appshunter.io/developer/650521042) |

## What reviewers say

### Vertical Shaft Alignment

[App page](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849)

This app guides users through the vertical shaft alignment process for motor and pump applications using specific Bluetooth-connected sensors. It facilitates measurement and alignment, and allows for instant PDF report generation on-site.

**Highlights:** Bluetooth sensor connectivity, Guided measurement and alignment process, Icon-based adaptive user interface, Instant PDF report generation, Works with RT-300/AT-200 sensors

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

**In-app purchases:** none


### PDB ePTW+

[App page](https://appshunter.io/ios/app/pdb-eptw-plus/id1510862906)

**In-app purchases:** none


## Frequently asked questions

### Is Vertical Shaft Alignment free?

Vertical Shaft Alignment is free to download, with no in-app purchases.

### Is PDB ePTW+ free?

PDB ePTW+ is free to download, with no in-app purchases.

### Do Vertical Shaft Alignment or PDB ePTW+ have ads?

Neither Vertical Shaft Alignment nor PDB ePTW+ shows ads.

### Which is updated more often, Vertical Shaft Alignment or PDB ePTW+?

Vertical Shaft Alignment ships an update every 6 months, and PDB ePTW+ every 4 months. Most recently, Vertical Shaft Alignment was updated on October 7, 2026 and PDB ePTW+ on October 4, 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.*