# EXFO OPM vs Horizontal Shaft Alignment

The clearest difference is rating: Horizontal Shaft Alignment at 5.0 against EXFO OPM's 1.0. EXFO OPM's advantage is ratings volume (7 vs 2) and iOS requirement (10.0 vs 15.0). 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.

Horizontal Shaft Alignment holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

EXFO OPM ships an update every 7 months, Horizontal Shaft Alignment every 4 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | EXFO OPM | Horizontal Shaft Alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (7 ratings)](https://appshunter.io/ios/app/exfo-opm/id1342361869/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/horizontal-shaft-alignment/id1499322319/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 62 MB | 123 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EXFO Inc.](https://appshunter.io/developer/462252930) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### EXFO OPM

[App page](https://appshunter.io/ios/app/exfo-opm/id1342361869)

This application connects to specific EXFO optical power meters and checkers via Bluetooth to display live measurements. It allows users to manage test configurations, store and edit measurement data, add GPS coordinates, and generate shareable PDF reports.

**Highlights:** Bluetooth connectivity to EXFO devices, Live measurement display, Measurement storage and management, Test configuration management, PDF test report generation, GPS coordinate tagging, JSON export for MPC-100

**Features:** macOS Compatibility

**In-app purchases:** none


### Horizontal Shaft Alignment

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

This app assists with horizontal shaft alignment for machinery like motors and pumps. It guides users through the measurement and alignment process using Bluetooth-connected sensors, 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 adjustment without re-measuring

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

**In-app purchases:** none


## Frequently asked questions

### Is EXFO OPM free?

EXFO OPM is free to download, with no in-app purchases.

### Is Horizontal Shaft Alignment free?

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

### Which has better reviews, EXFO OPM or Horizontal Shaft Alignment?

Horizontal Shaft Alignment is rated higher. EXFO OPM averages 1.0 out of 5 from 7 ratings, while Horizontal Shaft Alignment averages 5.0 from 2 ratings.

### Do EXFO OPM or Horizontal Shaft Alignment have ads?

Neither EXFO OPM nor Horizontal Shaft Alignment shows ads.

### Which is updated more often, EXFO OPM or Horizontal Shaft Alignment?

EXFO OPM ships an update every 7 months, and Horizontal Shaft Alignment every 4 months. Most recently, EXFO OPM was updated on October 20, 2026 and Horizontal Shaft Alignment on October 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.*