# Pre vs Spindle Dynamics Studio

The clearest difference is update cadence: Spindle Dynamics Studio at every 3 months against Pre's every 7 months. Pre's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, 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.

Pre ships an update every 7 months, Spindle Dynamics Studio every 3 months. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Pre | Spindle Dynamics Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pre-alignment/id1499479273/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 83 MB | 106 MB |
| Requires iOS | **15.0** | 17.6 |
| 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

### Pre

[App page](https://appshunter.io/ios/app/pre-alignment/id1499479273)

This app guides users through pre-alignment tasks using a connected Bluetooth probe. It allows measurement and recording of run-out, bearing clearance, and soft foot, with the ability to generate instant PDF reports.

**Highlights:** Bluetooth connectivity, Icon-based adaptive user interface, Measure and record Run-Out, Measure and record Bearing Clearance, Measure and record True SoftCheck, Generate instant PDF reports

**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, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

Pre 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 Pre or Spindle Dynamics Studio have ads?

Neither Pre nor Spindle Dynamics Studio shows ads.

### Which is updated more often, Pre or Spindle Dynamics Studio?

Pre ships an update every 7 months, and Spindle Dynamics Studio every 3 months. Most recently, Pre was updated on November 11, 2026 and Spindle Dynamics Studio on November 7, 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.*