I have been running this game on an Android tablet for years. I actually have a dedicated tablet for this that I keep on an end table with the game up and running. This made it easy to just glance over to see progress of regen etc. Ever since this last update, the tablet now goes to sleep after a period of time. I opened a support ticket and was told this is a "feature" of the game and was told to set the sleep timeout on my device. Well, most devices have a limit of 30 minutes, which is useless. Additionally, after the tablet goes to sleep and is woken up, the game needs to restart, which is also annoying. Oddly, when I look at the permissions for the app, one says "prevent tablet from sleeping" (which it also said before the update). I have tried uninstalling/reinstalling due to some other quirkiness with this latest version.
This post is mainly just a rant, since i have spent a considerable amount of money on it over the years, and feel like they are doing more to drive me away than keep me playing.