# Set Class Calculator — Pitch Class Analysis Assistant > Music theory app for pitch class set analysis and visualization. (iPhone/iPad app by Eddie Ludema.) - Source: https://appshunter.io/ios/app/set-class-calculator/id1505848977 (this page in markdown: same URL + `.md`) - Developer: [Eddie Ludema](https://appshunter.io/developer/1275326588) - Category: Music, Music, Education - Price: Free - Rating: 4.67/5 from 6 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 12.1 · 41 MB - Released: 2020-04-02 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/set-class-calculator/id1505848977/reviews.md ## What is Set Class Calculator? Set Class Calculator (SCC) is an easy to use tool that quickly calculates the various forms of a collection of pitch classes: Normal Form, Prime Form, Interval Vector and degrees of inversional and transpositional symmetry. You can use integers or note names on a pitch-class clock face and/or a mini-piano keyboard. With the clock face, you'll be able to quickly recognize the intervallic construction of any set of pitches and quickly spot the normal form of your set. In addition to simply calculating the normal form, prime form and interval vector, SCC generates a list of all transpositions (Tn) and inversions (TnI or In) in normal form of your set. You can even toggle into "clock face mode" where each transposition and inversion is represented by... a clock face! Common tones with your set are outlined in orange and each inversion shows the inversional mappings and axes of inversion! Set Class Calculator (SCC) was developed for my wonderful and curious Music Theory IV students at Idaho State University (Pocatello) in an effort to help them quickly find, explore and visualize relationships between set classes, helping them gain an appreciation and understanding of set based composition. (Of course, I made them learn how to do the calculations on their own first! ;) ## Key features - Pitch class set analysis - Normal Form calculation - Prime Form calculation - Interval Vector calculation - Transposition and inversion listing - Clock face visualization - Mini-piano keyboard input ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/set-class-calculator/id1505848977/reviews.md ### 5/5 — Great app for Set Theory *2021-10-24* This is an excellent tool for quickly obtaining any set and its complement, including Forte names and all transpositions and inversions of a given set. Can be viewed as numbers or as pitch classes. ### 3/5 — Of course I have no idea what this is *2020-07-26* But it looks interesting. However, if the keyboard is supposed to produce tones, it doesn’t. I have the latest update to iPadOS, running on an iPad Pro 9.7. ## Frequently asked questions about Set Class Calculator ### What is Set Class Calculator used for? Set Class Calculator is used for analyzing collections of pitch classes. It helps users quickly calculate and visualize normal form, prime form, interval vector, and relationships between set classes. ### Does Set Class Calculator have ads? No, Set Class Calculator does not contain advertisements. It is a completely ad-free application. ### What devices is Set Class Calculator available on? Set Class Calculator is available on iPhone, iPad, and iPod devices. ### How often is Set Class Calculator updated? The latest version of Set Class Calculator is 1.0.4, which was last updated on April 15, 2020. The app was initially released on April 2, 2020. ### What is the age rating for Set Class Calculator? Set Class Calculator has an age rating of 4+, making it suitable for a wide range of users. ### Can I input notes using a keyboard with Set Class Calculator? Yes, Set Class Calculator allows you to input notes using a mini-piano keyboard in addition to a pitch-class clock face. ### What are the key analytical features of Set Class Calculator? Key analytical features include calculating the Normal Form, Prime Form, and Interval Vector of pitch class sets. It also lists all transpositions and inversions. ### How does Set Class Calculator visualize set classes? Set Class Calculator offers a clock face mode where each transposition and inversion is represented visually. Common tones are highlighted, and inversional mappings are shown. ## Version history (last 4 releases) ### 1.0.4 — 2020-04-15 Fixed a typo! Db is now 1 instead of Eb... Whoops. ### 1.0.2 — 2020-04-07 - Bug fix! The mappings on the inversion clockfaces didn't rotate with their Sum/Index if all pitch classes were erased before switching to clockface list mode for the first time... Fixed it! ### 1.0.1 — 2020-04-06 - Small bug fixes (doesn't crash when a set has been completely erased and certain functions are performed). ### 1.0 — 2020-04-02 No release notes. ## More apps by Eddie Ludema - [Doctor Drone](https://appshunter.io/ios/app/doctor-drone/id1275326589) All apps by Eddie Ludema: https://appshunter.io/developer/1275326588 --- *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.*