Tune. Play. Enjoy. iDoctor Tuner Pro is a multi-instrument tuner for musicians who want a fast, elegant and precise tool, with no ads, no subscriptions and no in-app purchases. Tune guitar, 12-string guitar, bass, ukulele, guitalele, mandolin, violin, Cuban tres, requinto, bandurria, 4-string banjo and 5-string banjo, with multiple tunings and an interface designed to be clear from the very first second. FOUR TUNING MODES Digital: arc gauge with 25 color-coded indicators. Green when in tune, yellow in the intermediate zone and red when off. Indicators move with fluid animation for greater visual precision. Meter: high-precision linear meter showing deviation in cents with smooth and continuous movement. Analog: classic needle gauge inspired by vintage galvanometers. The needle responds to sound with natural movement and gently returns to center when no signal is detected. Manual: generates reference tones per string for tuning by ear. Reflects the active capo position when set. INSTRUMENTS AND TUNINGS Guitar, 12-String Guitar, 4-String Bass, 5-String Bass, Ukulele, Guitalele, Mandolin, Violin, Cuban Tres, Requinto, Bandurria, 4-String Banjo, 5-String Banjo. Includes standard and alternative tunings: Drop D, half step down, Open G, Open D, DADGAD and others. CAPO TUNING BY FRET Select the fret where you place the capo and tune your instrument exactly as you are going to play it. The tuner automatically calculates the real frequencies for each string at that position. A feature rarely found in mobile tuners. FOUR LANGUAGES The app detects the device language and displays the interface in Spanish, English, French or German. PRIVACY The microphone is used only to analyze sound frequencies. Audio is processed on the device and is not recorded, stored or sent to any server. NO SUBSCRIPTION. NO IN-APP PURCHASES. No ads, no hidden payments, no in-app purchases. At home, in lessons, at rehearsal, in the studio or just before going on stage: iDoctor Tuner Pro gives you a fast, clear and reliable reference. Because tuning should be simple. And playing should be what matters.