# Piano Doctor - A Piano Tuner — Let's tune your piano

> Piano tuning app analyzing fundamental and harmonic frequencies for accurate pitch detection. (iPhone/iPad app by Jongseung Park.)

- Source: https://appshunter.io/ios/app/piano-doctor-a-piano-tuner/id6738971293 (this page in markdown: same URL + `.md`)
- Developer: [Jongseung Park](https://appshunter.io/developer/1745560101)
- Category: Music, Utilities, Music
- Price: $4.99
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 6 MB
- Languages: English
- Released: 2024-12-12
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/piano-doctor-a-piano-tuner/id6738971293/reviews.md

## What is Piano Doctor?

This app analyzes piano sounds. It detects the frequencies in the sound and estimates how far the sound's tone is away from the target tone.

While detecting the middle and higher tones of a piano can be done with little difficulty, detecting lower tones such as A0 (27.5Hz) raises a challenge. This is because most mobile devices' microphones cannot pick up such low tones.

To overcome the difficulty, this app looks at two bands of frequencies: a fundamental band and a harmonic band. The fundamental band is the frequency range between -50 cents and +50 cents centered at the target frequency. Harmonic bands are the frequency bands where the frequencies are integer multiples of the fundamental band. This app examines 6 harmonic bands (from the second to the seventh) and selects the best one automatically.

Measuring the fundamental band allows users to detect middle and higher tones, while measuring the harmonic band allows users to detect lower tones.
By measuring the harmonic band as well as the fundamental band, this app can detect the entire range of piano tones from A0 to C8.

To graphically show the detected tones, two gauges are provided: one for the fundamental tone and another for the harmonic tone. Two spectrum viewers are also provided alongside the corresponding gauges. While gauges are good at showing peak tones, spectrum viewers are showing frequency spreads in two-dimensional shapes. Spectrums help identify which band's measurement is stabilized and ready to be read.

Buttons are used to select target pitch and octave quickly and randomly. Preset buttons are available for 7 preselected tones for easy-tone-selection and self-test. The preset buttons can also generate their corresponding tones through the device's speaker if they are double-clicked. This provides a self-test feature: with the self-generated tone on and the speaker at the proper volume, at least one of the gauges should report the precise tone that is being generated.

## Key features

- Frequency analysis for piano tuning
- Detects fundamental and harmonic bands
- Tunes entire piano range (A0-C8)
- Graphical gauges and spectrum viewers
- Select target pitch and octave
- Preset tones for self-testing


## Frequently asked questions about Piano Doctor

### How does Piano Doctor tune a piano?

Piano Doctor analyzes the frequencies of piano sounds. It detects both the fundamental frequency band and harmonic bands to estimate how far the sound's tone deviates from the target pitch, allowing for precise tuning across the entire piano range.

### Can Piano Doctor tune low piano notes like A0?

Yes, Piano Doctor is designed to overcome the challenge of tuning low notes. By examining harmonic bands in addition to the fundamental band, it can accurately detect tones from A0 (27.5Hz) up to C8.

### What does Piano Doctor show graphically?

The app provides two gauges, one for the fundamental tone and one for the harmonic tone, to graphically display detected tones. It also includes two spectrum viewers alongside the gauges, showing frequency spreads to help identify stabilized measurements.

### How can I test Piano Doctor's accuracy?

Piano Doctor includes a self-test feature. You can double-click preset buttons to generate tones through your device's speaker. When the generated tone is playing, at least one of the app's gauges should report the precise tone being generated.

### What is the price of Piano Doctor?

Piano Doctor is available for a one-time purchase of $4.99. This price grants you full access to all its tuning and analysis features.

### Is Piano Doctor available on Android devices?

Based on the provided data, Piano Doctor is currently supported on iPhone and iPad. Information regarding Android availability is not specified.

### How often is Piano Doctor updated?

The latest version, 1.1.0, was released on February 5, 2025. This indicates the app is actively maintained and updated by its developer.

### Does Piano Doctor have ads?

No, Piano Doctor does not contain advertisements. The app is ad-free, providing an uninterrupted tuning experience for users.

## Version history (last 2 releases)

### 1.1.0 — 2025-02-05

Manual pages are better organized and navigation among them is improved by adopting table views and SwiftUI framework. Review requesting is added inside the app to make reviewing and rating easier. Gauge reading is more stable than previous version by adopting longer averaging. When microphone access is disallowed, an alert view will appear reminding users that this app needs microphone.

### 1.0 — 2024-12-12

No release notes.

## Apps similar to Piano Doctor

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Tuner: guitar, ukulele, bass](https://appshunter.io/ios/app/tuner-guitar-ukulele-bass/id1507738194) | 4.7 (300) | Free | Music |

## More apps by Jongseung Park

- [Calculator for Complex Field](https://appshunter.io/ios/app/calculator-for-complex-field/id6502463794)

All apps by Jongseung Park: https://appshunter.io/developer/1745560101

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*