Hi again @fcbanky I just want to explain what is happening here. The boosters we collected are stored on device's memory, not on King's server. This way we can reach them even when we are online. Unfortunately, when we uninstall the game or change the device the boosters are lost. We do not recommend collecting a lot of boosters, it's better if you just use them while playing. You can read more about this topic on the link below.