organice renders clickable links automatically
organice is an implementation of Org mode without the dependency of Emacs - built for mobile and desktop browsers. It is free and open source software, developed on Github with a free instance hosted at https://organice.200ok.ch/.
In today’s release, we added support for automatic phone numbers recognition. Wherever organice finds a supported phone number format, it will render it as a clickable link. The user can just click the link and start a phone call.
Here’s a demo showing the ability to start a call directly from organice:

organice already recognized various types...