Oh! I'm so sorry. I had this happen to me too once but it's not apkpure, its dragonvale. You have to log in using a google account or facebook account so dragonvale can save your data. (Facebook is more reliable in personal experience). But yes. Basically you go to social, theres a little log in button in the bottom left/middle area and you can log in and connect an account from there. That way everytime you login it uses your data from that account and has it saved on the account and not the app so you can delete the app, and come back and as long as you log in with your account your data should still be there. :D