A simple Carnatic violin tuner for Indian classical violinists, with a tanpura drone built in. Pick your shruti, bow an open string, and the tuner tells you exactly which peg to turn.

Made for Carnatic violin, not adapted from a guitar tuner. The four strings are shown the way you learnt them: Sa and Pa, from the thinnest string to the thickest, with the Western note under each.

PICK YOUR SHRUTI (SRUTHI) OR KATTAI
• Choose by note or by kattai number: 1 = C, 1½ = C#, 2 = D, 2½ = D#, 3 = E, 4 = F, 4½ = F#, 5 = G, 5½ = G#, 6 = A, 6½ = A#, 7 = B.
• The app shows the four string notes for that shruti instantly. No more working out Sa Pa Sa Pa by hand.
• Automatic string order: Sa Pa Sa Pa for most shrutis, and Pa Sa Pa Sa for A, A#, B, C and C# so your strings keep a safe tension. You can change it in Settings.
• A tension warning when a shruti pulls a string too far from normal, with the safer order suggested.

TUNE EACH STRING
• Bow an open string and the tuner finds which string you are playing.
• Clear advice: "Flat, tighten", "Sharp, loosen" or "In tune", with a needle showing cents.
• Far out of tune? It says "Much too low, use the peg" and names the note to aim for.
• Tap a string to tune only that one.
• Steady needle that ignores the octave jumps a bow attack often causes.
• Swara names with sthayi dots (mandra and tara), plus Western note names if you want them.

TANPURA (TAMBURA) DRONE
• Pa Sa Sa low-Sa drone at your shruti, like an electronic tanpura or shruti box.
• Ma, Ni or Sa as the first string for ragas without Pa.
• Adjustable speed and volume.
• Keeps playing with the screen off, with a Stop button in the notification. Perfect for practice, alapana and singing along.

MORE
• Reference pitch from A = 430 to 450 Hz.
• Light and dark themes. Option to keep the screen on while tuning.
• Works fully offline. No account, no ads, no tracking. The microphone is used only to hear your string and nothing is recorded.

Whether you are a beginner tuning a violin for the first time or a performer who wants a quick, accurate Carnatic tuner and sruti box in one app, Shruti Tuner keeps your violin at the right shruti.