# Pre vs iAlignShaft

The clearest difference is price: Pre at Free against iAlignShaft's $2.99. Pre also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.2). On update cadence, ads and in-app purchases there is nothing between them.

Pre is free to download; iAlignShaft costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pre ships an update every 7 months, iAlignShaft every 11 months. The most recent releases landed on June 24, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Pre | iAlignShaft |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| 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 11 months |
| Monetization | Free | — |
| Size | 67 MB | 2 MB |
| Requires iOS | **13.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Hans Babylone](https://appshunter.io/developer/1550504166) |

## 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

**In-app purchases:** none


### iAlignShaft

[App page](https://appshunter.io/ios/app/ialignshaft/id1561514816)

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

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

### Is iAlignShaft free?

iAlignShaft costs $2.99, with no in-app purchases.

### Do Pre or iAlignShaft have ads?

Neither Pre nor iAlignShaft shows ads.

### Which is updated more often, Pre or iAlignShaft?

Pre ships an update every 7 months, and iAlignShaft every 11 months. Most recently, Pre was updated on June 24, 2026 and iAlignShaft on September 13, 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.*