RAYTUNER — Guitar Tuner

Tuning, made plain

• A note you can read at a glance

  The detected note fills the screen. Explicit words tell you what to do, so color is never the only signal.

  • Flat · tighten −24 cents
  • In tune +1 cent
  • Sharp · loosen +6 cents

• A ±50 cent gauge

  One stable needle shows how far you are from the target, with signed cents beneath the note. Left is flat, right is sharp.

• Auto or a single string

  Auto detects the string you play. Tap a string to lock onto it and tune to that target until you tap Auto again.

• Six presets and Custom

  Pick a tuning from the list, or save one Custom tuning of your own.

  Standard

  E2 A2 D3 G3 B3 E4

  Drop D

  D2 A2 D3 G3 B3 E4

  Half-step down

  E♭2 A♭2 D♭3 G♭3 B♭3 E♭4

  DADGAD

  D2 A2 D3 G3 A3 D4

  Open G

  D2 G2 D3 G3 B3 D4

  Open D

  D2 A2 D3 F♯3 A3 D4

• Adjustable A4 reference

  Set A4 anywhere from 432 to 446 Hz in 1 Hz steps, with a slider and a stepper. Reset to 440 Hz in one tap.

• Reference tone

  Hear the selected string. Tuning pauses while the tone plays, and resumes when you turn it off.

• Light and dark

  Warm white by day, deep green at night. RAYTUNER follows your system appearance.

• Built for everyone

  VoiceOver reads one clear result, like “String 6, E2, flat by 24 cents, tighten.” Dynamic Type scales every label.

Design previews

Design illustrations of the app, not screenshots.