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.
– These sites existed because the music industry was slow to adapt. The DMCA and local laws couldn't keep up with decentralized, offshore hosting.
They found sanctuary in the shadows of Yaaya Mobi.
Using historical MP3 search engines like yaaya.mobi presented significant risks, which likely contributed to its decline: mp3 search engine yaaya mobi
: Most of its features are accessible without creating an account. Safety and Legitimacy
Many historical mobile platforms were built with minimal code to load quickly on 2G and 3G data connections. Understanding Yaaya Mobi – These sites existed because the music industry
: Offers high-quality 320kbps downloads and the ability to convert music URLs from sites like SoundCloud. How To Download Any MUSIC On Your Smartphone #freemusic
The interface was legendary for its simplicity—just a search bar and a promise. While other sites were cluttered with pop-up ads and broken links, Yaaya felt like a direct line to the global library of sound. The Index of Everything Using historical MP3 search engines like yaaya
For classical music or historical recordings, platforms like Musopen provide legal, high-quality MP3 downloads completely free of charge.
An MP3 search engine is a specialized web crawler. Unlike general search engines that index all types of web pages, these platforms focus specifically on locating audio files hosted across the internet.
The internet changed how we listen to music. Before streaming services like Spotify and Apple Music became global standards, digital audio was defined by the MP3 file format. During the peak era of digital music downloads, dedicated MP3 search engines and indexes became highly popular. Platforms operating under domains like carved out a niche by offering users direct access to downloadable audio files.
Piano Companion is a music theory reference app that gives musicians instant access to 1,500+ chords with inversions, 10,000+ scales, a chord progression builder, reverse chord lookup, and an interactive circle of fifths. It is available on iOS, Android, and macOS, and supports 40+ languages. Whether you are a beginner learning your first chords or a professional songwriter sketching ideas, Piano Companion provides the answers you need in seconds.
Tap the piano keys you know on screen or connect a MIDI keyboard, and Piano Companion identifies every matching chord and scale in real time. This is especially useful when you hear a chord in a song but don't know its name — just play the notes and the app tells you what they form.
Piano Companion is free to download on iOS, Android, and macOS. The free version includes core chord and scale lookups. A Pro upgrade unlocks additional features including all chord inversions, the full scale library, the chord progression builder, and the circle of fifths tool.
Yes. Connect any MIDI keyboard to your device and Piano Companion will detect the notes you play, identifying chords and scales in real time. This works on iOS (via Camera Connection Kit or Bluetooth MIDI), Android (via USB OTG), and macOS (via USB or Bluetooth).
Piano Companion is available on iPhone, iPad, Android phones and tablets, and macOS. Your chord libraries sync across devices, so you can start on your phone and continue on your Mac.
Available on every major platform. Start exploring chords and scales today.
