# PianoDisc Calibrate vs KTool

The clearest difference is rating: PianoDisc Calibrate at 4.5 against KTool's 4.0. PianoDisc Calibrate also leads on iOS requirement (13.0 vs 15.6). KTool's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 6 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. PianoDisc Calibrate sells 1 one-off in-app purchase. KTool asks for nothing beyond the download.

PianoDisc Calibrate holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

PianoDisc Calibrate ships an update every 6 weeks, KTool fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | PianoDisc Calibrate | KTool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/pianodisc-calibrate/id955611164/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/ktool/id6746480823/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 62 MB | 47 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Burgett Inc.](https://appshunter.io/developer/955611163) | [Kutai](https://appshunter.io/developer/528199380) |

## What reviewers say

### PianoDisc Calibrate

[App page](https://appshunter.io/ios/app/pianodisc-calibrate/id955611164)

This utility app allows professional installers to calibrate automatic player pianos equipped with specific systems. It provides access to detailed settings for keys, pedals, and volume controls, streamlining the setup process for trained technicians.

**Highlights:** Key calibration, Pedal settings, Volume control adjustment, Firmware updates, MIDI interface compatibility, SilentDrive HD settings

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Activation Region Key | $999.99 | one-time |


### KTool

[App page](https://appshunter.io/ios/app/ktool/id6746480823)

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

**In-app purchases:** none


## Frequently asked questions

### Is PianoDisc Calibrate free?

PianoDisc Calibrate is free to download, with in-app purchases available.

### Is KTool free?

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

### Which has better reviews, PianoDisc Calibrate or KTool?

PianoDisc Calibrate is rated higher. PianoDisc Calibrate averages 4.5 out of 5 from 2 ratings, while KTool averages 4.0 from 1 ratings.

### Do PianoDisc Calibrate or KTool have ads?

Neither PianoDisc Calibrate nor KTool shows ads.

### Which is updated more often, PianoDisc Calibrate or KTool?

PianoDisc Calibrate ships an update every 6 weeks, and KTool fortnightly. Most recently, PianoDisc Calibrate was updated on October 24, 2026 and KTool on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*