# simalube CalPro vs Pre

The clearest difference is update cadence: Pre at every 7 months against simalube CalPro's every 48 months. simalube CalPro's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

simalube CalPro ships an update every 48 months, Pre every 7 months. The most recent releases landed on September 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | simalube CalPro | Pre |
| --- | --- | --- |
| 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 48 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 1 MB | 67 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [biwac websolutions ag](https://appshunter.io/developer/567668974) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### simalube CalPro

[App page](https://appshunter.io/ios/app/simalube-calpro/id567668971)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is simalube CalPro free?

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

### Is Pre free?

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

### Do simalube CalPro or Pre have ads?

Neither simalube CalPro nor Pre shows ads.

### Which is updated more often, simalube CalPro or Pre?

simalube CalPro ships an update every 48 months, and Pre every 7 months. Most recently, simalube CalPro was updated on September 19, 2026 and Pre on September 28, 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.*