# KSB Sonolyzer vs Shaft Alignment Calculator

The clearest difference is price: KSB Sonolyzer at Free against Shaft Alignment Calculator's $5.99. Shaft Alignment Calculator's advantage is update cadence (every 2 days vs every 4 months) and iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

KSB Sonolyzer is free to download; Shaft Alignment Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KSB Sonolyzer ships an update every 4 months, Shaft Alignment Calculator every 2 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | KSB Sonolyzer | Shaft Alignment Calculator |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Size | 88 MB | 20 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KSB SE & Co. KGaA](https://appshunter.io/developer/533763415) | [Eiji Shinohara](https://appshunter.io/developer/1894855517) |

## What reviewers say

### KSB Sonolyzer

[App page](https://appshunter.io/ios/app/ksb-sonolyzer/id999364617)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shaft Alignment Calculator

[App page](https://appshunter.io/ios/app/shaft-alignment-calculator/id6762618674)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KSB Sonolyzer free?

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

### Is Shaft Alignment Calculator free?

Shaft Alignment Calculator costs $5.99, with no in-app purchases.

### Do KSB Sonolyzer or Shaft Alignment Calculator have ads?

Neither KSB Sonolyzer nor Shaft Alignment Calculator shows ads.

### Which is updated more often, KSB Sonolyzer or Shaft Alignment Calculator?

KSB Sonolyzer ships an update every 4 months, and Shaft Alignment Calculator every 2 days. Most recently, KSB Sonolyzer was updated on October 26, 2026 and Shaft Alignment Calculator on October 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.*