DTMF - Sound of Dialing Keypad app for iPhone and iPad

4.6 ( 1456 ratings )

Utilities Education
Developer: NINTHBOAT INC.

Free

Current version: 1.3, last update: 5 years ago
First release : 01 Mar 2013
App size: 4.78 Mb

You know the beeps when you are dialing a number.
But do you know the beeps are identical?
You can learn what numbers the beeps refer to by using this app.