Looking for a NAV 2016 Javascript Add-in tutorial

Hello, I've done Add-in's before for NAV Windows Client, but I'm trying to start developing for Web Client and Phone Client, and it's been a nightmare so far

I've tried with the Bing Maps Tutorial, but I can't make it work on Web or Phone client, it only works on NAV Windows Client. I've been looking for a very simple tutorial, just to add a button on my pages for Phone Client, but I can't find anything.

Do you know of any tutorial very simple for a beginner like me?

Thanks