iPhone Screenshots


Completely redesigned decoder!

Turns your iPhone into a simple DTMF decoder. Simply hold the iPhone's microphone near to a clear source of DTMF tones (telephone "Touch Tones") and it will display the numbers being dialed. The decoded digits are also placed into a text area from which you can copy them to the clipboard.

A row of LEDs indicate which frequencies are present in the signal - each LED corresponds to a single frequency.

See it in action here:

Source code freely available:

What’s New

Version 1.8.2

Restored the ability to capture tones when the app is in the background.

Ratings and Reviews

3.3 out of 5
11 Ratings

11 Ratings

Dr Pepper addict ,


Any way to get this work with new iPhone update???
Great app but now it won’t work....

timh10111213 ,

I have to revise my review

When I first downloaded this app it didn’t work at all but after rebooting my iPhone 7 Plus it works GREAT! I actually used it at work today to grab the digits of an auto-dialer that dials very fast and it got it right every time. This thing works almost as well as a real digit grabber. I give it 5 stars now.

Cryptonoid ,

Great app for professionals in the telecom industry

I use this app regularly when troubleshooting autodialers and telephone entry systems. It saved me so much time. You must adjust noise levels in order to detect dtmf tones in noisy environments.

App Privacy

The developer, dreadtech.com, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Martin Wellard
1.6 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

You May Also Like