# Piano Tuner's Slide Rule — Partials Check Note Calculator

> Partials Check Note Calculator (iPhone/iPad app by Mark Cerisano.)

- Source: https://appshunter.io/ios/app/piano-tuners-slide-rule/id1645711444 (this page in markdown: same URL + `.md`)
- Developer: [Mark Cerisano](https://appshunter.io/developer/1645711446)
- Category: Utilities, Music
- Price: $34.99
- Age rating: 4+
- Requires: iOS 15.0 · 1 MB
- Languages: English
- Released: 2022-10-03
- Data updated: 2026-06-08
- User reviews in markdown: https://appshunter.io/ios/app/piano-tuners-slide-rule/id1645711444/reviews.md

## What is Piano Tuner's Slide Rule?

Never again be confused by the partial series, coincident partials, or check notes. Piano Tuner's Interval Slide Rule will easily show you all those simply by sliding your finger around on the screen.

- Use the partial series to know what notes to listen for when tuning unisons.
- Use the coincident partial setting to know where to listen when tuning intervals.
- Use the check note feature to know for sure which check notes you need to use to tune any interval pure or wide or narrow, depending on your tuning system.


## Version history (last 1 release)

### 1.0 — 2022-10-03

No release notes.

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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 2026-06-08.*