On February 16, 2018 I purchased an Acer Chromebook. I was reluctant at first because the word was Chromebooks didn't support Android apps. Then I read where Google had made improvements in their OS to include android apps. So I decided to give it a try.
I was able to download and install SS5 plus on my Chromebook without a hitch. I was able to open it and do everything except the auto scan of the night sky. There is no GPS button on the tool bar either. So if you need to that part of the app the Chromebook isn't the way to go. I have not had the chance to see if or how it will work connecting to a mount and controlling it. I won't have that opportunity to try that until April. I'm keeping my fingers crossed that everything else will work.
FYI, I have installed another planetarium program that also has the auto scan feature and it didn't work properly either. The sky came up and showed it pointing to the south the entire time with a little wiggle here and there no matter where I pointed the tablet. So their could be something inherent in the Chromebook or software that can't do the GPS.
I'll try to give updates after I get to use this more on the Chromebook. I love the Chromebook! It's a great little tablets so far especially for the price. Just wish it would have had an illuminated key board.