Searching for Power BI add-in and feature i found online an interesting website where you can find and test all the power bi visualization on PC, Tablet and Phone .

I suggest you to try it on this link.

The page have this structure:

On the left tab you can select:

• Visual: select custom visual that you want to know
• Data view ( for now we have only one type)
• Randomize: we can randomize number to view how change report
• Show Animation: show animation features if exist on custom visual
• Show Interaction: Show interaction of different visual

Good Try!