This app will give you a 16 tone DTMF keypad plus a 1750Hz button and the ability to generate custom DTMF sequences, as well as set the duration and tone/silence ratio. Included are the characters 1234567890*#, the menu tones ABCD, and a 1750Hz button. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. To clear the DTMF sequence, tap and hold the DTMF button. Use the Mute button to silence the keypad during programming.
This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators. If your radio or microphone does not have DTMF, then you can use this app instead.
Official DTMF pad of RFinder Android Radio http://androiddmr.com