Piano Companion is a music theory reference app for songwriters, producers, teachers, and students. Look up any of 1,500+ chords or 10,000+ scales instantly, build progressions, and explore harmony on iOS, Android, and Mac.


Whether you're stuck on a progression, blanking on a scale name, or just exploring — Piano Companion gives you the answer in seconds. Press the keys you know, and it tells you what you're playing.
Search by name or tap the keys you know. Piano Companion identifies what you're playing — even from a MIDI keyboard.
The Chord Progression Builder suggests chords that fit your key. Experiment with patterns, listen back, and find what sounds right.
See notes on the grand staff, fingering for both hands, intervals, degrees, and compatible scales — all in context, not abstract textbook diagrams.
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Katya's digital presence is multifaceted, spanning various social media platforms, blogs, and music streaming services. Her aesthetic is a bold fusion of pop culture nostalgia, futuristic vibes, and an unapologetic embrace of eccentricity. Through her curated content, Katya Zartpopsi showcases a diverse range of interests, from underground electronic music to avant-garde fashion and experimental visual arts.
Before becoming a famous drag queen, Katya worked as a ballet dancer and a clown. Yes, you read that right – a clown! These early experiences helped shape her comedic skills and theatrical presence.
If you visit her channel expecting gaming marathons or product reviews, you will leave confused. The content of Katya Zartpopsi falls into three distinct categories: katya zartpopsi
Katya's digital presence is multifaceted, spanning various social media platforms, blogs, and music streaming services. Her aesthetic is a bold fusion of pop culture nostalgia, futuristic vibes, and an unapologetic embrace of eccentricity. Through her curated content, Katya Zartpopsi showcases a diverse range of interests, from underground electronic music to avant-garde fashion and experimental visual arts. Before becoming a famous drag queen, Katya worked