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Hi Ramboroger- Boosters are stored to the device itself and not the app. So reinstalling Candy Crush could cause you to lose some of your Boosters so I would try to use any freebies up before you reinstall just to be on the safe side. The good news is that any Boosters or Gold Bars that you have bought can always be restored using the "restore purchases" option. Let me know how you get on :-)