# pianoscope – Piano Tuner — Professional piano tuning

> Professional piano tuning assistant for iOS devices. (iPhone/iPad app by Frank Illenberger.)

- Source: https://appshunter.io/ios/app/pianoscope-piano-tuner/id1529249459 (this page in markdown: same URL + `.md`)
- Developer: [Frank Illenberger](https://appshunter.io/developer/1529249461)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 4.70/5 from 278 App Store ratings · 83 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 13 MB
- Languages: American English, Czech, Dutch, French (France), German (Germany), Italian, Japanese, Polish, Russian, Chinese (Simplified, China) and 2 more
- Released: 2021-05-18
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/pianoscope-piano-tuner/id1529249459/reviews.md

## What is pianoscope?

pianoscope turns your iPhone or iPad into the ultimate assistant for high-quality piano tuning — for professional piano tuners and passionate pianists alike.

Free two-week trial. pianoscope Standard & Pro are available as in-app purchases.


FOR PROFESSIONAL PIANO TUNERS

With the Pro edition of pianoscope, you can increase your precision and efficiency and make your work less strenuous. Measure the inharmonicity of an instrument at lightning speed, or accelerate the pitch raising of strongly out-of-tune pianos. With pianoscope Pro, you will meet the expectations of even the most demanding pianists.


HOW IS PIANOSCOPE DIFFERENT FROM OTHER PROFESSIONAL PROGRAMS?

Conventional programs determine the required stretch similarly to piano tuners working aurally. They start with a temperament octave and go outward from there with fixed intervals. The disadvantage is that you, as a tuner, have to determine which intervals are suitable for the partial structure of an individual instrument.
With pianoscope, you only have to decide which intervals should generally be as pure as possible and choose the appropriate tuning style. Through thousands of calculations — impossible for a human — the program finds a tuning curve that optimally satisfies your requirements.

Find more information at www.pianoscope.app/features/pro


FOR PASSIONATE PIANISTS

Are you frustrated that your piano soon loses its finely balanced sound after being professionally tuned? With pianoscope Standard and some practice, you can create high-quality tunings yourself. You don't have to train your hearing for years. All you need is a little hands-on skill and the courage to learn something new.

Find more information at www.pianoscope.app/features/standard


STANDARD FEATURES (AVAILABLE VIA IN-APP PURCHASE)

- Measurement of the individual inharmonicity and partial strengths of an instrument
- Available tuning styles: Balanced, Octaves Pure, Fifths Pure, Twelfths Pure, Nineteenths Pure
- Concert pitch selection: 400.00 Hz – 480.00 Hz
- Numerical display of target pitch and current deviation in cents
- Fast-reacting automatic key selection
- Responsive graphical feedback with indicator scale and/or strobe
- Individual tuning documents for each of your instruments
- Synchronize documents across multiple iPhones and iPads via iCloud Drive, Dropbox, or similar cloud services
- Adjustable range, for example for tuning harpsichords
- Use one of over 80 predefined unequal temperaments
- Supports iOS Dark Mode


PRO FEATURES (AVAILABLE VIA IN-APP PURCHASE)

- Graphical representation of the calculated tuning curves
- Detailed deviation curves for fourths, fifths, octaves, twelfths, double octaves, nineteenths, and triple octaves
- Create custom tuning styles with individual weighting of single intervals
- Optional extra stretch, separate for bass and treble
- Individual calculation of the overpull for pitch raising
- Perform pitch raises without muting unisons using the spectrum display
- Optimize the concert pitch
- Display current partial intensities in the tuning view
- Use the freeze indicator to increase consistency
- Advanced strobe settings
- Additional information for each instrument: manufacturer, model, serial number, notes
- Calibrate your iPhone or iPad to a reference tone
- Use multiple microphones to increase accuracy

Download pianoscope now and start your free trial of all features!

Privacy policy: https://pianoscope.app/en/privacy
Terms of use: https://pianoscope.app/en/terms

## Key features

- Inharmonicity measurement
- Customizable tuning styles
- Pitch raising assistance
- Automatic key recognition
- Graphical tuning feedback
- Cloud synchronization for tuning documents

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Annual Subscription | $169.99 | per year |
| Pro Monthly Subscription | $17.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Unlock Standard | $99.99 | one-time |
| Unlock Pro | $699.99 | one-time |
| Upgrade from Standard to Pro | $599.99 | one-time |


## What do users think of pianoscope?

Overall sentiment: positive

**Pros**

- 🎯 Highly accurate tuning results
- 👍 Intuitive and easy-to-use interface
- 💡 Advanced inharmonicity measurement and visualization
- 🎨 Clean, modern, and distraction-free design
- 🔧 Multiple temperament options and customization
- 📊 Helpful visual displays (strobe, line indicators, graphs)
- 🚀 Fast and efficient tuning process
- ⭐ Superior to competing apps (CyberTuner, Verituner)
- 🎵 Produces professional-quality tunings
- 💪 Reliable long-term tuning stability
- 🆓 Fair free trial without requiring payment info
- 👨‍💼 Excellent customer service and developer responsiveness
- 🎓 Useful learning tools for aural training
- 📱 Works reliably on iOS devices

**Cons**

- 💰 High pricing ($100-$600) perceived as expensive
- 🚫 Requires paid subscription/trial to access full features
- ⚠️ Confusing paywall and subscription model
- 📱 iOS-only, no macOS or Windows version
- 🔊 Difficulty detecting very high notes (7th octave)
- 🔊 Difficulty detecting very low notes (zero octave)
- ❌ Rigid pitch range restrictions for non-standard instruments
- 📖 Obtuse or unclear documentation
- 🌍 Pricing not adjusted for international markets/currencies
- 🎛️ Missing spinner indicator (familiar UI element)
- 🔍 Limited visibility of frequency display during tuning

**Commonly reported bugs**

- App freezes during free trial signup
- Unable to cancel or disable free trial subscription
- Automatic subscription enrollment not clearly communicated
- Error: Unable to process request
- App refuses to allow tuning of specific pitch ranges
- App won't delete completely, leaving residual files
- Difficulty with high note detection in certain pianos
- Rigid gatekeeping prevents tuning with incomplete instrument data

**Most requested features**

- macOS and Windows desktop versions
- Spinner indicator option for familiar interface
- Frequency display visible for all notes during tuning
- Installment payment plans for Pro version
- Chinese language support
- More flexible pitch range settings for non-standard instruments
- Ability to tune with missing or broken strings
- Subscription cancellation clarity and easier management
- Adjusted pricing for different geographic regions
- Subscription option (e.g., yearly at $150 instead of $600 lifetime)

## Recent user reviews (10 of 83)

All indexed reviews: https://appshunter.io/ios/app/pianoscope-piano-tuner/id1529249459/reviews.md

### 1/5 — The Mac App Is Non-Functional (Useless)

*2026-08-06*

Don’t waste your time with the mac app. It’s completely useless. I started the free 2 week trial, and the app literally does nothing. I noticed in the app store, it says “mac app not verified”. That’s an understatement. Why make your app available for mac when it doesn’t even work? Hello? Developer? Anyone there?

### 5/5 — Best ETD/Tuning App available

*2026-08-03*

I would not be able to do my job without this app. I tune toughly 20 pianos a week and besides my tuning hammer this is the most important tool in my bag. By far the best tuning app out there, and the app keeps improving and adding features that full time techs request. 10/10 recommend this to anybody, new or professional, its features are helpful to all!

### 5/5 — Fantastic App

*2026-07-18*

Very accurate, easy to use.

### 5/5 — Super

*2026-07-14*

Das ist eins der besten Softwareentwicklung die ich kenne

### 3/5 — Mise au diapason 435hz

*2026-07-12*

Bonjour,

Je pense avoir rencontré un problème avec PianoScope.

J’ai créé un nouveau fichier d’accord entièrement depuis zéro. Avant de commencer la pré-mesure, j’ai réglé le diapason de concert sur 435 Hz dans les paramètres de l’instrument.

Après avoir effectué la pré-mesure et commencé l’accord, PianoScope indique que le La4 est parfaitement accordé (0,00 cent). Cependant, la fréquence affichée est d’environ 439,3 Hz.

Pour vérifier, j’ai utilisé une autre application d’accordage (Pano Tuner), qui mesure également 439,3 Hz pour cette même note.

Mes paramètres sont les suivants :

* Diapason de concert : 435 Hz
* Tempérament : Égal
* Nouveau fichier d’accord créé après avoir réglé le diapason sur 435 Hz.

Malgré cela, PianoScope semble toujours accorder le La4 autour de 439–440 Hz, alors qu’il devrait être proche de 435 Hz.

Est-ce le fonctionnement normal de l’application ? Ai-je oublié un réglage particulier, ou s’agit-il d’un bug ?

Je peux également vous transmettre des captures d’écran des paramètres et des mesures si cela peut vous aider à identifier le problème.

Merci d’avance pour votre aide.

**Developer response:** Bonjour, je pense que vous avez utilisé le mode Mise au diapason de pianoscope. Ce mode doit être utilisé lorsque vous montez ou descendez fortement la hauteur d'un instrument, par exemple de plus de 5 cents en moyenne. Dans ce mode, une fois la pré-mesure effectuée, pianoscope calcule une valeur de surcompensation spécifique pour chaque note. La surcompensation signifie que pianoscope vous fait accorder plus haut (au moyen des marqueurs de cible orange en forme de triangle) que la hauteur cible, afin de tenir compte du mouvement de la table d'harmonie et du cadre en fonte qui se produira lorsque vous accorderez les notes suivantes. Dans ce mode, vous devez accorder de façon linéaire de La0 à Do8 et accorder les unissons au fur et à mesure, car le calcul de la surcompensation repose sur cet ordre. D'après votre description, je ne peux pas déterminer si vous avez suivi cet ordre ni si vous avez accordé d'autres notes après avoir accordé le La4. La mise au diapason part du principe que l'accord des notes situées au-dessus du La4 fera redescendre la hauteur du La4 près de la hauteur cible réellement visée.

Pour plus d'informations sur le mode Mise au diapason, consultez le manuel utilisateur https://www.pianoscope.app/manual4/website/en/pitch-raise-pro/basics/index.html (disponible en anglais uniquement).

### 5/5 — Works like a charm!

*2026-07-06*

I have only used the free trial and am still contemplating buying it, but if you want a reliable piano tuner this is it! Worked well, worked with all 88 keys and was precise! Sometimes a bit too precise… 😅
Great app! Would highly recommend!

### 5/5 — 😍Amazing🎹Tuner🥳

*2026-06-24*

Really love this tuner and was able to successfully a severely detuned [untuned for decade(s?)] upright I was gifted, despite it being my first time piano tuning - although I have decades of mechanical and multi-instrumental + mixing & mastering production under my belt. This app was clutch in pulling it off successfully. The pro features are amazing and I'd love to give 6+ stars for the automatically ending free trial in stark opposition to the dastardly auto-enrollment avaricious big companies do. I sincerely applaud the developer's integrity! 🙌 IMHO, the pro version is where it's at, but at 600$ it is steep and although I believe that's a fair price for how cutting edge the algorithm is, I would love to see an installment option; like if you could buy pro for a year (150$) and after 4 years that converts to the lifetime that would be awesome. I did just find out that if you buy the standard for 100$, you only pay the difference to upgrade to pro, so perhaps the pro sub works as described above? Idk I found out about the upgrade on their site forum but cannot find any info on how the sub works. Im gonna snag the standard version for now so I can tune up thru the winter seasons swings. Thanks again for making such a beautiful app. Happy playing y'all! 🎹 🎉 Love & Blessings! ❤️💛💚

**Developer response:** Thank you for your feedback. Unfortunately, the Apple App Store does not offer installment payments. So for now, you have the option to do a one-time purchase of the pro version or do a subscription. You can always upgrade from the Standard version one-time purchase to the Pro version later by just paying the price difference.

### 2/5 — Très bof

*2026-06-10*

L’accordage fonctionne très bien sur les cordes seuls mais par contre il ne détecte pas quand il y a deux ou trois cordes donc accordage incomplet très très nul l’accordage

### 5/5 — A Tuning Must-Have

*2026-05-22*

I have only used the 14 day free trial thus far, but it a couple of sittings my friend and I, with minimal experience, got my piano tuned beautifully!!! We tried tuning by ear, which seemed at first to work, but ultimately sounded a bit off... this gives you precise quality control, enabling you to tune down to the cent! I will say on some lower treble and bass strings the tuner jumps around quite a bit— not sure why, but I still feel it works great! I highly recommend! I have yet to purchase it... I think $100 bucks is a bit overpriced, but hey, the creator’s got to make money too, and how many people honestly purchase a tuning app? I think for me, the cost is definitely worth it— I mean, how much do piano tuners charge? I would not recommend paying all that money for the pro version... I did not see any of the pro features to be useful enough to spend that much... they are features not even professional piano tuners need.

### 5/5 — Großartige Sache!

*2026-05-07*

Diese App ist tatsächlich ganz großartig!

Ich nutze sie sicher nur zu einem kleinen Teil aus (ich stimme professionell Cembalo, auf verschiedenen Stimmtönen und in verschiedenen Temperaturen; ich bin Dozent für historische Tasteninstrumente an Dr. Hoch‘s Konservatorium, Frankfurt).

Die Einstellmöglichkeiten und Anzeigen sind sehr wertvoll für die Praxis. 

Funktioniert zuverlässig auch in schwierigen akustischen Umgebungen.

Ganz besondere Empfehlung!

## Frequently asked questions about pianoscope

### What does pianoscope do?

pianoscope transforms your iPhone or iPad into a sophisticated assistant for creating high-quality piano tunings. It provides tools for professional piano tuners to increase precision and efficiency, and for passionate pianists to tune their own pianos.

### What are the key features of pianoscope?

Key features include measurement of inharmonicity and overtone strengths, various tuning styles (Balanced, Octaves Pure, etc.), adjustable concert pitch, fast automatic key recognition, graphical tuning feedback, and the ability to create individual tuning documents. Pro features offer graphical representation of tuning curves and custom tuning style creation.

### How much does pianoscope cost?

The app offers a free two-week trial. The 'pianoscope standard' and 'pianoscope pro' editions are available as in-app purchases, providing access to advanced features for pianists and professional tuners respectively.

### What devices is pianoscope compatible with?

The app is designed for iPhone and iPad devices. It also supports iOS Dark Mode and allows synchronization of tuning documents between multiple devices via cloud services like iCloud Drive or Dropbox.

### Who would benefit from using pianoscope?

Professional piano tuners can use the pro edition to enhance their precision and speed up processes like pitch raising. Passionate pianists can use the standard edition to learn how to tune their own pianos, achieving a finely balanced sound without years of hearing training.

## Version history (last 5 releases)

### 4.0.6 — 2026-08-27

RENAMING INSTRUMENTS

The name of an instrument can now be edited directly in the instrument settings. The document is renamed along with it. If another document already uses that name, a number is appended automatically.


ZOOMING THE TUNE SCALE AND THE KEYBOARD

On the iPad the menu bar offers new commands for enlarging and reducing the tune scale and the on-screen keyboard, including keyboard shortcuts. Until now this was only possible with a two-finger gesture.


SWIPING THROUGH THE PITCH RAISE SETTINGS

Swipe left and right to move between the pages of the pitch raise settings.


FIXES

• Starting the app could hang while the license was being checked over a poor network connection.
• The one-time pro purchase was blocked while a cancelled subscription was still running.
• Typing at the beginning of the instrument notes duplicated the input at the end and moved the cursor.
• The beat synchrony chart was cut off at the bottom edge on the iPad.
• Swiping between temperaments did not work while the chart was shown in a panel.
• Overlapping partial bars could cover each other's numbers.
• The weight options in the tuning plan menu are now dimmed while no deviation curves are shown.
• Fixed issues with startup when running on macOS.

### 4.0.5 — 2026-06-29

FIXED ISSUES

• Changes to a custom tuning style are now saved reliably.
• The notes for the highest wound string and the treble struts of a pitch raise can now again be set by playing them on the piano.
• Opening a tuning document is no longer occasionally delayed by a few seconds.

### 4.0.4 — 2026-05-08

Fixed issue with indicator freezing in the high treble.

### 4.0.3 — 2026-04-22

Fixed Issues:
- Occasionally, spurious treble notes were detected when playing bass notes.
- In some cases, the freeze indicator failed to appear for a played note.

### 4.0.2 — 2026-04-16

Fixed issues:
- The tuning scale did not consistently update after the device was rotated.
- The automatic key detection could get stuck on wrong notes.

New Features:
- Added Japanese localization.

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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 2026-09-01.*