Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.
It's been said by the moderators that the boosters are attached to app so if you delete it you will lose them.
Regarding the lives, you should read this post:
https://care.king.com/en/papa-pear-saga/i-m-not-receiving-my-messages-lives-from-friends