# Horizontal Shaft Alignment vs Spindle Dynamics Studio

The clearest difference is device support: Horizontal Shaft Alignment at 3 against Spindle Dynamics Studio's 1. Spindle Dynamics Studio's advantage is iOS requirement (13.0 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 ships an update every 4 months, Spindle Dynamics Studio every 2 months. The most recent releases landed on October 21, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Horizontal Shaft Alignment | Spindle Dynamics Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/horizontal-shaft-alignment/id1499322319/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 123 MB | 107 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Sens-OS](https://appshunter.io/developer/1533837951) |

## 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, Vision Pro support

**In-app purchases:** none


### Spindle Dynamics Studio

[App page](https://appshunter.io/ios/app/spindle-dynamics-studio/id1661428624)

**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 Spindle Dynamics Studio free?

Spindle Dynamics Studio is free to download, with no in-app purchases.

### Do Horizontal Shaft Alignment or Spindle Dynamics Studio have ads?

Neither Horizontal Shaft Alignment nor Spindle Dynamics Studio shows ads.

### Which is updated more often, Horizontal Shaft Alignment or Spindle Dynamics Studio?

Horizontal Shaft Alignment ships an update every 4 months, and Spindle Dynamics Studio every 2 months. Most recently, Horizontal Shaft Alignment was updated on October 21, 2026 and Spindle Dynamics Studio 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.*