PiaTune is a professional-grade piano tuning application available for iPhone, designed for both professional tuners and tuning enthusiasts. The app functions similarly to an aural tuner, providing users with a reliable method for tuning pianos. The free version includes 500 notes, allowing users to explore its features, while the paid version, available through an in-app purchase, removes these limitations for a comprehensive experience.

Key features of PiaTune include its simplicity, speed, reliability, precision, and versatility. Users can select the piano size, measure inharmonicity, and adjust tuning parameters with ease. The app can measure all 76 notes in just a few minutes or sample a few notes for quick tuning. With precise calculations to +/- 0.01 cents, PiaTune adapts to various piano types, offering additional screens for Voicing and Measuring Beats to enhance the tuning process.