While you can view Jungle Scout on your phone or tablet, it is best viewed on a computer. There are no restrictions so Jungle Scout will work on any device that has an internet browser and a connection. BUT, there is A LOT of information there! Jungle Scout will display the same way you see it on your computer screen so while it can be viewed on most tablets fairly well, its often too much data to read on a standard phone screen.
The Extension is a bit different in that it is an extension and Google Chrome extensions are not currently supported on mobile devices (tablets/smartphones/ipads).
If this changes and Google makes Chrome extensions compatible with mobile devices, we will be sure to make JSLite and JSPro available for tablets and smartphones.
For now, though, we are limited to using the extension on our laptops and desktops.