# Anisotropic Piano Tuner — Professional inharmonicity ETD

> Professional inharmonicity ETD (iPhone/iPad app by Victor Rovinsky.)

- Source: https://appshunter.io/ios/app/anisotropic-piano-tuner/id6792484919 (this page in markdown: same URL + `.md`)
- Developer: [Victor Rovinsky](https://appshunter.io/developer/1411997448)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 8 MB
- Released: 2026-07-27
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/anisotropic-piano-tuner/id6792484919/reviews.md

## What is Anisotropic Piano Tuner?

Anisotropic Piano Tuner is a professional Electronic Tuning Device (ETD) that builds the tuning around the exact instrument in front of you.

MEASURED, NOT ASSUMED
Per-note inharmonicity is measured from the live spectrum with a high-resolution FFT. Your stretch curve is calculated from those measurements — not copied from a generic piano profile.

CORE TUNING
• Individual stretch curve across all 88 keys
• Octave styles, or an entropy-based solver
• Manual target adjustment for any key
• Electronic strobe and needle meter
• Stable pitch detection with an adjustable noise gate

TEMPERAMENTS
• Equal plus historical temperaments: Werckmeister III, Kirnberger III, Vallotti, Young, Pythagorean, Meantone 1/4 and 1/6, Kellner
• Full custom temperament editor

PITCH RAISE
• Survey the instrument, calculate compensated targets and perform a preliminary pass with an adjustable over-pull factor

BEYOND PITCH
• Sound-quality and stability indicators
• Unison beat analysis and aural interval checks

INSTRUMENT RECORDS
• Save each piano with its curve, history, notes, voice memos and reference photos
• Generate a clear text report
• Back up your whole library to a single file — no account, no cloud

TRY IT FREE
Three complete octaves are free. Unlock all 88 keys with a monthly or yearly subscription, or a one-time lifetime purchase.

PRIVATE BY DESIGN
The tuning features work fully offline. No accounts, no analytics, no advertising. Everything stays on your device.

Built-in technical help in 13 languages. Universal app for iPhone and iPad.

Anisotropic Piano Tuner offers an auto-renewing subscription (monthly or yearly) and a one-time lifetime purchase to unlock all 88 keys. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in your App Store account settings.
Terms of Use: https://anisotropicaudio.com/terms.html
Privacy Policy: https://anisotropicaudio.com/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Full Version — Monthly | $19.99 | per month |
| Full Version — Yearly | $99.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime — all 88 keys | $299.00 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-28

No release notes.

## More apps by Victor Rovinsky

- [TetroWords](https://appshunter.io/ios/app/tetrowords/id1411997449)
- [TetroWordsLite](https://appshunter.io/ios/app/tetrowordslite/id1471861163)
- [Wholesome Story A Day](https://appshunter.io/ios/app/wholesome-story-a-day/id6758908125)

All apps by Victor Rovinsky: https://appshunter.io/developer/1411997448

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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 2026-08-14.*