Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.
Hi @Gionimis !
The Boosters are saved directly on the device so you can use them even though you are offline or in flight mode.
You can transfer the Boosters with a backup system or cloud when changing device. The options depends on what device you play on and what options the platform offers.
Any purchased items can always be resent to your ne device when contacting our Player Support.