The tuner listens through the microphone or a sound card, detects the pitch, and shows on a needle how many cents the sound is off. When the sound is close, the gauge zooms automatically to a fine range of ±20 cents, and a short beep plays when the pitch is accurate.
Note: a regular flat (like E♭) is a semitone, so it is blue. Only a half-flat (↓, e.g. E↓ or B↓) is a quarter tone, shown in yellow. Each quarter tone is drawn inside the fret box above it, and if that box also holds a regular note, both are shown side by side. Play it by bending the string or on a fretless guitar.
Yes, in the Chrome or Safari browser, at a secure (https) address. Inside apps such as WhatsApp, Facebook and Instagram the browser blocks the microphone, so you need to open the address in a regular browser.
Yes. In the settings choose the instrument: a tetrachordo bouzouki (C F A D) or trichordo (D A D), or a bağlama with one of 19 tunings (düzen). The tuner also recognizes the octave strings.
No. The sound is processed in real time inside the browser and is not saved or sent to a server.