# PianoDisc Calibrate vs bOTP

The clearest difference is review sentiment: PianoDisc Calibrate at 100% against bOTP's 0%. PianoDisc Calibrate also leads on update cadence (every 6 weeks vs every 29 months). bOTP's advantage is in-app purchases (none vs 1). On price, ads, monetization model and device support there is nothing between them.

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

PianoDisc Calibrate ships an update every 6 weeks, bOTP every 29 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | PianoDisc Calibrate | bOTP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/pianodisc-calibrate/id955611164/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 29 months |
| Monetization | Free | Free |
| Size | 62 MB | 3 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Burgett Inc.](https://appshunter.io/developer/955611163) | [Alexander Hausner](https://appshunter.io/developer/1327546177) |

## 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 |


### bOTP

[App page](https://appshunter.io/ios/app/botp/id1327546178)

This utility generates one-time passwords for secure authentication. It supports multiple profiles and stores secrets securely on the device's keychain, making them inaccessible after setup. Passwords can be easily copied to the clipboard for quick use.

**Highlights:** Easy to use interface, Multiple profile support, Secure secret storage on keychain, Secrets are hidden and inaccessible, One-time passwords copied to clipboard

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PianoDisc Calibrate free?

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

### Is bOTP free?

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

### Do PianoDisc Calibrate or bOTP have ads?

Neither PianoDisc Calibrate nor bOTP shows ads.

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

PianoDisc Calibrate ships an update every 6 weeks, and bOTP every 29 months. Most recently, PianoDisc Calibrate was updated on October 24, 2026 and bOTP on October 20, 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.*