Introducing "Song Key By Ear" - the ultimate app for music enthusiasts and students seeking to enhance their aural skills and deepen their understanding of music theory. With its innovative approach, this app revolutionizes the way you learn and explore melodies.

At the heart of the app lies the iconic Circle of Fifths, where you can toggle between major and minor scales and chords. Beneath it, a two-octave piano awaits your touch. Tap on any scale or chord, and the app will play it, simultaneously highlighting the corresponding notes on the piano and the related scales/chords on the Circle of Fifths.

But the true magic happens when you listen to a melody. As the notes unfold, tap the scales or chords that resonate with the melody. The app will guide you by playing the selected options, allowing you to discern whether they are consonant or dissonant with the melody. When you find the perfect match, the highlighted group of six scales/chords on the Circle of Fifths reveals the key of the melody.

Dive deeper by exploring chord progressions. Tap the chords on the Circle of Fifths, and the app will reveal the melodic journey, note by note, on the piano. "Song Key By Ear" is more than just an app; it's a comprehensive learning experience. As you interact with the intuitive interface, you'll train your ear, visualize notes, and gain a profound understanding of music theory in a fun and engaging way.