Guys if you ask about "how to update without losing your data on mobile" i think there's no way to do that. but you can copy your data if you using pc/mac. So you have to start new game in every update if u using android.
nah there's a way... if you about to delete the older app because you got a new updated apk just find the data file and temporarily rename it with numbers then delete the older apk then start install the new one, once you're than go back to the file and rename it to its default name,... its that easy...