In my game the player collects stars. I have achievements set up on the google dev console so when they reach a certain amount of stars collected, 250 stars collected, 1000 stars collected, 5000 stars collected... an achievement is unlocked.
But what if the player is in-between achievements?
Lets say the player starts using his tablet to play my game. He collects 700 stars. He then goes out to a movie. While waiting for the movie to start, he plays my game on his phone.
How can i make sure that he will still have those 700 stars, and not have to start from zero stars on his phone?