Two tools from the app — ready to use immediately, no installation. Both tools run entirely in your browser, your data stays on your device.
Tool 1
Metronome
120
BPM
Meter
Tip: The first beat of every measure (accented gold click) marks the downbeat. Visual pendulum for the eye, precise click for the ear — ideal for practicing with guitar, bass or piano.
Tool 2
Tuner
—
— Hz
−50−250+25+50
— cent
Click "Start Microphone" — then play a note
Standard E-A-D-G-B-e: The strings light up green when the detected note matches. Play a single open string — the tuner shows the note and cent deviation. Note: Microphone access required (HTTPS).
More tools in the App
Circle of Fifths Auto additionally includes circle of fifths, chord builder, scales, intervals and animated waveforms — fully offline.