DTMF - Sound of Dialing Keypad

发行商 NINTHBOAT INC. AppTrack Ninja。

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.

分类: Education, Utilities

的 App Store 排名、截图、估算和类似应用。 DTMF - Sound of Dialing Keypad.