Jungle Scout
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 with an internet browser and a connection. However, not all information will be optimized for mobile devices, and the display will be similar to what you see on your computer screen, so while it can be viewed on most tablets fairly well, it's often too much data to read on a standard phone screen.
The Extension
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 Jungle Scout available for tablets and smartphones.
For now, though, we are limited to using the extension on a laptop and desktop.