# Chord Calculus

> Fretted instrument chord, scale, and progression tool with custom tunings and tuner. (iPhone/iPad app by Steven Pollack.)

- Source: https://appshunter.io/ios/app/chord-calculus/id1239631425 (this page in markdown: same URL + `.md`)
- Developer: [Steven Pollack](https://appshunter.io/developer/1239631424)
- Category: Music, Education
- Price: $2.99
- Rating: 3.90/5 from 8 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 64 MB
- Languages: American English
- Released: 2017-05-24
- Data updated: 2026-06-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chord-calculus/id1239631425/reviews.md

## What is Chord Calculus?

ChordCalculus is a tool for players of fretted instruments. ChordCalculus will allow the user to choose from a large number of pre-defined fretted instruments in a variety of tunings.   Additionally, the user can define new instruments and/or tunings.    Single or multiple capos can be added.  The user then picks from one of four operating modes using the segmented selectors at the center top of the display:

* (C)hord Calculator:

   Show all fingerings for chords for a given instrument/tuning, filters, capos, and fret span.

* Chord (I)dentifer:

   For a given instrument/tuning and fingering, display all possible names for a chord

* (S)cale Display: 

   For an instrument/tuning, key and scale type, display the scale, and play a two-octave scale 

* (P)rogression Player: 

   Derived from chord mode, display fingerings for a chord progression.  Also plays chords in sequence.

In all cases, the chords can be played as a chord or arpeggio and the scale played back.

As of version 2.0, an instrument tuner is accessed by long touching the tuning button.

See https://www.youtube.com/watch?v=Ty5eI_DiXhk&t=20s for all the features

## Key features

- Chord calculator with fingering display
- Chord identifier for unknown fingerings
- Scale display and playback
- Chord progression player
- Custom instrument and tuning creation
- Capo support
- Instrument tuner

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/chord-calculus/id1239631425/reviews.md

### 3/5 — Crashing

*2019-07-07*

Upgraded rating. Thanks to the developer for his quick response. The app runs fine now. Three stars because the user interface is a bit opaque. 

[Original review: Bought this yesterday (7/3/19) and installed it on my phone (iPhone XS Max, iOS 12.3.1). It ran fine then, but subsequent attempts to run the app on the following day failed, with the app crashing after displaying the splash screen. Hard iPhone reset failed to resolve the issue.]

**Developer response:** Try erasing and reistalling.   That seems to fix it.   I am not getting any crash reports from Apple so hard to diagnose.   May have to do with syncing.   Please leave a note on my website, especially if you are installing it on 2 devices.

### 5/5 — Don’t waste your money!

*2018-10-10*

Used to be great app, but after UPDATE, it crashes went you 
Enter data it crashes.
No way to contact developer.
Would give it a lower rating, but only goes to one star!

**Developer response:** So sorry for your experience.   Version 1.34 (released today) fixes that bug introduced in 1.33.   Also, please use the message function at www.yellowroselutherie.com to confirm that your problem has resolved with the is new revision.

Thanks for the update of your review and giving Chord Calculus 5 Stars!!  More enhancements on the way!!!

### 5/5 — Doesn’t Work With New Operating System

*2018-10-09*

The app quits when you try to enter data.  Can’t enter a Root.

**Developer response:** I am sorry you are having a problem.   Its not a iOS problem.  I found a glitch causes by introducing the quick select tools for the iPhone.   It crashes the iPad.   I am putting up a fix tonight.

### 4/5 — STILL NO CONTACT!!!

*2018-09-21*

Has been a decent app until latest update - now it fails to launch!  There is no contact info in the developers page to report this or find a solution!

*UPDATE* Quick turnaround on bug fix! I enjoy the app and the interface is fairly intuitive. I have multiple chord apps and I find this one to be my go to for chording. Keep up the good work!

**Developer response:** Thanks for pointing out this bug.   Affected older iPads.   It's fixed.   Please update and try Chord Calculus now.   Would appreciate an updated review.

### 4/5 — Help!

*2018-08-25*

UPDATE: Looks like my issue was user error.  Cool app, especially for free!

This is a really useful app, and I use it all the time.  However, the latest update appears to be non-functional on my iPhone 8+.  Specifically, the “Type” menu on the left-most screen has disappeared.  This app really is cool, so I hope a fix will be forthcoming.  When it works, it’s five stars!

**Developer response:** Thanks for the review!!   Hope you like the new quick selectors.

## Frequently asked questions about Chord Calculus

### What instruments does Chord Calculus support?

Chord Calculus supports a large number of pre-defined fretted instruments and allows users to define their own. This includes instruments like guitars, ukuleles, and basses, with various tunings and capo configurations.

### How does the Chord Calculator mode work in Chord Calculus?

In Chord Calculator mode, you can input your instrument, tuning, capo settings, and fret span to see all possible fingerings for chords. This feature helps visualize how to play specific chords on your instrument.

### Can Chord Calculus help me identify chords I don't know?

Yes, the Chord Identifier mode in Chord Calculus allows you to input a fingering for a given instrument and tuning, and it will display all possible names for that chord. This is useful for learning by ear or deciphering unknown chord shapes.

### Does Chord Calculus have a tuner?

Yes, as of version 2.0, Chord Calculus includes an instrument tuner. You can access it by long-touching the tuning button within the app.

### What are the operating modes in Chord Calculus?

Chord Calculus offers four main operating modes: Chord Calculator, Chord Identifier, Scale Display, and Progression Player. These modes cover a wide range of musical analysis and practice needs for fretted instruments.

### What is the age rating for Chord Calculus?

Chord Calculus has an age rating of 4+. This indicates it is suitable for a wide audience, including younger users interested in music.

### How often is Chord Calculus updated?

The latest version of Chord Calculus is 4.00, and it was last updated on September 9, 2023. This suggests a relatively active development cycle for the application.

### What devices is Chord Calculus available on?

Chord Calculus is available on iPhone and iPad. This means users with Apple mobile devices can utilize its features for their musical needs.

## Version history (last 5 releases)

### 4.00 — 2023-09-09

- Sharing settings and configurations across all your devices.
- True sharp and flat symbols
- Improved Configuration/Setup management
- Sharp/Flat switching for display of accidental tones/notes

### 3.00 — 2023-02-18

- Filter Icons now in in text form.
- Long touches bring up help on most interface tools.

### 2.07 — 2019-10-05

Minor bug fix for identify mode. Prevents a "non-chord" from locking out display chords for subsequent fingerings.

### 2.06 — 2019-09-17

Minor UI enhancements and better synchronization sounds and visual indicators when playing scales.

### 2.05 — 2019-08-26

Fixes:
- iCloud sync further stabilized.
- If the local file structure of the app becomes corrupted, the app will rebuild it.   Per Apple policies, the app will require a user-initiated restart.  
   The user will be prompted via a dialog.

## Apps similar to Chord Calculus

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Chordify: Songs, Chords, Tuner](https://appshunter.io/ios/app/chordify-songs-chords-tuner/id1073624757) | 4.7 (32,771) | Free | Music |
| [Ultimate Guitar: Chords & Tabs](https://appshunter.io/ios/app/ultimate-guitar-chords-and-tabs/id357828853) | 4.7 (2,924) | Free | Music |
| [Bass Tuner.](https://appshunter.io/ios/app/bass-tuner/id1471438485) | 4.1 (688) | Free | Music |
| [Tuner ONE: guitar & ukulele](https://appshunter.io/ios/app/tuner-one-guitar-and-ukulele/id1435060008) | 4.5 (288) | Free | Music |
| [Tuner Pro: Guitar Tuner & Tab](https://appshunter.io/ios/app/tuner-pro-guitar-tuner-and-tab/id1438248122) | 4.5 (43,668) | Free | Music |
| [Tunefor Ukulele tuner & chords](https://appshunter.io/ios/app/tunefor-ukulele-tuner-and-chords/id1153333408) | 4.3 (14,657) | Free | Music |

## More apps by Steven Pollack

- [Chord Calculus Lite](https://appshunter.io/ios/app/chord-calculus-lite/id1464452718)

All apps by Steven Pollack: https://appshunter.io/developer/1239631424

## Related topics

[5chords](https://appshunter.io/ios/topics/5chords)

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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 2026-06-04.*