# Horizontal Shaft Alignment vs RSR Alignment App

The clearest difference is rating: Horizontal Shaft Alignment at 5.0 against RSR Alignment App's 3.0. RSR Alignment App's advantage is iOS requirement (11.0 vs 13.0). 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 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Horizontal Shaft Alignment ships an update every 4 months, RSR Alignment App every 3 months. The most recent releases landed on September 9, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Horizontal Shaft Alignment | RSR Alignment App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/horizontal-shaft-alignment/id1499322319/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 123 MB | 57 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [TMC CO.,LTD](https://appshunter.io/developer/920283832) |

## What reviewers say

### 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

**In-app purchases:** none


### RSR Alignment App

[App page](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170)

Measure camber and toe angles using your smartphone. The app displays angles for all four corners, allows zero point adjustment, and stores measurement data for later reference. It also lets you change the measurement interval.

**Highlights:** Measure camber angle, Measure toe angle, Display four-corner angles, Zero point adjustment, Store measurement data, Change measurement interval

**Features:** macOS Compatibility

**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 RSR Alignment App free?

RSR Alignment App is free to download, with no in-app purchases.

### Which has better reviews, Horizontal Shaft Alignment or RSR Alignment App?

Horizontal Shaft Alignment is rated higher. Horizontal Shaft Alignment averages 5.0 out of 5 from 2 ratings, while RSR Alignment App averages 3.0 from 2 ratings.

### Do Horizontal Shaft Alignment or RSR Alignment App have ads?

Neither Horizontal Shaft Alignment nor RSR Alignment App shows ads.

### Which is updated more often, Horizontal Shaft Alignment or RSR Alignment App?

Horizontal Shaft Alignment ships an update every 4 months, and RSR Alignment App every 3 months. Most recently, Horizontal Shaft Alignment was updated on September 9, 2026 and RSR Alignment App on June 11, 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.*