Tuning Fork Pro is a free iPhone app developed by Pedro Daniel Macalupu Cumpen. This app is designed to help musicians tune their instruments by ear with precision and ease.

With Tuning Fork Pro, you can generate notes from A1 to C7 in four different waveforms, including sine, square, triangle, and sawtooth. The app also allows you to calibrate the A4 note from 415Hz to 466Hz, ensuring accurate tuning for different musical contexts.

One of the standout features of Tuning Fork Pro is its instant load and highly precise algorithm for tone emission. This means you can quickly access the app and rely on its accuracy when tuning your instrument.

The app also offers an output volume setting, allowing you to adjust the sound level to your preference. It is compatible with external speakers, making it convenient for use in various settings.

Tuning Fork Pro is a 64-bit universal app, which means it works seamlessly on iPhone, iPad, and iPod touch devices. Whether you're a professional musician or a beginner, this app provides a reliable and efficient tool for tuning your instruments by ear.