# Horizontal Shaft Alignment vs Vibration Diagnostic Service

The clearest difference is rating: Horizontal Shaft Alignment at 5.0 against Vibration Diagnostic Service's 2.0. On price, ratings volume, update cadence and ads there is nothing between them.

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

Horizontal Shaft Alignment holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Horizontal Shaft Alignment ships an update every 3 months, Vibration Diagnostic Service every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Horizontal Shaft Alignment | Vibration Diagnostic Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/horizontal-shaft-alignment/id1499322319/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/vibration-diagnostic-service/id1634378327/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 123 MB | 120 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Johnson Controls, Inc.](https://appshunter.io/developer/503559091) |

## What reviewers say

### Horizontal Shaft Alignment

[App page](https://appshunter.io/ios/app/horizontal-shaft-alignment/id1499322319)

This application assists with horizontal shaft alignment for motor and pump setups using specific Bluetooth-connected sensors. It guides users through the entire measurement and alignment process, offering features like Feetlock for challenging situations and instant PDF reporting.

**Highlights:** Bluetooth sensor connectivity, Guided measurement and alignment process, Feetlock function for base-bound machines, Instant PDF report generation, ACOEM Cloud integration for reporting and sharing, VertiZontal™ for simultaneous vertical and horizontal adjustment

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

**In-app purchases:** none


### Vibration Diagnostic Service

[App page](https://appshunter.io/ios/app/vibration-diagnostic-service/id1634378327)

This service helps diagnose machinery health by analyzing vibratory forces emitted by HVAC and rotating equipment. It facilitates the creation of maintenance plans to prevent premature failure and downtime. Data is collected wirelessly via a connected device and analyzed by certified professionals.

**Highlights:** Vibration data collection, Wireless data acquisition, Cloud-based analysis, Predictive maintenance planning, Certified analyst reports, Email report delivery

**In-app purchases:** none


## Frequently asked questions

### Is Horizontal Shaft Alignment free?

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

### Is Vibration Diagnostic Service free?

Vibration Diagnostic Service is free to download, with no in-app purchases.

### Which has better reviews, Horizontal Shaft Alignment or Vibration Diagnostic Service?

Horizontal Shaft Alignment is rated higher. Horizontal Shaft Alignment averages 5.0 out of 5 from 2 ratings, while Vibration Diagnostic Service averages 2.0 from 4 ratings.

### Do Horizontal Shaft Alignment or Vibration Diagnostic Service have ads?

Neither Horizontal Shaft Alignment nor Vibration Diagnostic Service shows ads.

### Which is updated more often, Horizontal Shaft Alignment or Vibration Diagnostic Service?

Horizontal Shaft Alignment ships an update every 3 months, and Vibration Diagnostic Service every 2 months. Most recently, Horizontal Shaft Alignment was updated on November 3, 2026 and Vibration Diagnostic Service on November 3, 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.*