GPF Easy Diapason

GPF Easy Diapason is a simple tuning fork app for iPhone. It plays a continuous reference tone to help tune instruments and voices. The interface is clean and minimal, with quick controls for sound setup. Main features: - Tap the 3D tuning fork to start or stop sound - Reference frequency presets: A440, A432, A444, Baroque 415 - Base frequency control from 220 Hz to 880 Hz - Fine tuning in cents (-50 to +50) - Volume control - Waveform selection: Sine, Square, Triangle, Saw - Real time frequency display in Hz - Version and build info in footer Design: - Black and white style - Clear typography - Focused single screen workflow for fast use Technical notes: - Built with SwiftUI - Audio engine based on AVAudioEngine and AVAudioPlayerNode - Automatic build number increment on each build This app is made for musicians, students, choir practice, and anyone who needs a fast and reliable pitch reference on iPhone.