I have the Nexus 7 and I use litchi. It works great and the tracking mode didn't work to well. Everything else does though. I did have some video lag and I read somewhere to change a few settings and after I did it works great. Changing to channel 20 instead of auto and the refresh rate.I've a Nexus 7 2013 running the Android version of DJI Go and that seems to be fine so far but I've not tried running anything like Litchi on it, so I don't know how well it would stand up to running an app like that, I've heard that the tracking mode in Litchi needs a really good CPU and lots of RAM, maybe more than a Nexus 7 could provide!
It works great and the tracking mode didn't work to well. Everything else does though. I did have some video lag and I read somewhere to change a few settings and after I did it works great. Changing to channel 20 instead of auto and the refresh rate.