App profile & analytics · Music · Data updated 2026-10-21

GPF Easy Diapason

by Gian Paolo Fontani · Free · Version 1.0

Availability On the App Store since March 2026 ↗

GPF Easy Diapason is made and published by Gian Paolo Fontani. AppBrain is an independent app data site and isn't affiliated with Gian Paolo Fontani. The app name, icon, screenshots and description belong to Gian Paolo Fontani and are shown as published on the App Store.

About GPF Easy Diapason

GPF Easy Diapason is a music app developed by Gian Paolo Fontani.

User Ratings

The app has no ratings yet.

App Information

GPF Easy Diapason is freely available from the App Store. The app size is 279.00 kB. The latest version available is 1.0. The last update was on March 5, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since March 2026.

Description by Gian Paolo Fontani (from the App Store)

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.

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More data about GPF Easy Diapason

Price	Free
Rating	No ratings
Ranking	Not ranked
Version	1.0
App size	279.0 KB
Suitable for	Everyone

Screenshots

Screenshots by Gian Paolo Fontani, from the the App Store listing

Official page on the App Store

Alternatives to GPF Easy Diapason

Changelog of GPF Easy Diapason

No changelog data

Developer information for Gian Paolo Fontani

Gian Paolo Fontani

Address:

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App Store Rankings for GPF Easy Diapason

This app is not ranked

Technologies used by GPF Easy Diapason

Frequently asked questions about GPF Easy Diapason

Is GPF Easy Diapason free?

Yes. GPF Easy Diapason is free on the App Store.

Is GPF Easy Diapason still available?

Yes. GPF Easy Diapason is on the App Store, and the last update we saw was on March 5, 2026.

How large is GPF Easy Diapason?

GPF Easy Diapason is 279.00 kB.

Is GPF Easy Diapason suitable for children?

App Store rates the content of GPF Easy Diapason as suitable for everyone.

Who made GPF Easy Diapason?

GPF Easy Diapason was developed by Gian Paolo Fontani. It is listed in the music category on the App Store.

What are the best alternatives to GPF Easy Diapason?

People looking at GPF Easy Diapason also look at these music apps: iDiapason, GuitarPath Tuner, Klef: Learn Music & Theory, Tone Generator: Frequency Hz, Harmonic Tuner.

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