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DTMFdec is a highly sensitive DTMF-tone decoder which dynamically adapts to noisy or quiet environments.

Decoded numbers are stored in a list, from where you can perform actions like:
• dial number
• new contact with number
• add number to existing contact
• copy to pasteboard

Especially the "copy to pasteboard" feature is useful when you want to lookup the number in your local phone directory or just google for it.

DTMFdec is able to decode the following digits:

Watch a demo video on the web site or http://tinyurl.com/dtmfdec

What’s New

Version 1.3

added support for new devices

Ratings and Reviews

Randy in CNY ,

Overpriced beacuse it's not fast enough.

This could have been a cool app and a useful utility to have. But it fell short in that it does not decode tones fast enough to capture a simple fax dialing out. The entire purpose of my buying it.

I feel giped even though it was only $2.99!!

It would only get 2/3rds of the number and not necessarily all in a row.

Dave Hegyera ,

Multi-Tennant Doorphone

We had a Multi-Tennant doorphone that transmitted DTMF from the door station to the controller in the basement. We needed to determine the transmitted numbers. This product worked very well, and showed us what digits were sent. From there we could make changes to the system for proper operation. Great product, and a time saver!

DLD101 ,

App does not work

Total waste of money. App disappears while trying to record or when you press stop. Never recorded anything.

Developer Response ,

Hi, sorry to hear you're having issues.
I've just released an update that should fix the crashes.
If you continue having issues, please contact me through the contact form linked in the description.

App Privacy

The developer, Jérémie Blaser, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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