How to put a link in HTML that opens Viber/Whatsapp/iMessages/Facetime in a smart phone?

Question

I want to find a way so that people browsing a website from a smart phone can contact the company via any of the preferred methods.

Doing it for Skype is easy... but what about Viber/Whatsapp/iMessages/FaceTime?

Is that possible?

Answer 1

It's possible.

You have to know url scheme which this apps registered for themselves. Of cause, if they did it.

For example Facebook application uses fb:// scheme. For other applications look through their ipa files (main plist files)