I know that when you move to a new device you get your gold bars and progress only, but i have many boosters and i don't wanna lose them, is there a way i can move them too ?
Boosters are connected directly to the device memory, which is why they cannot be transferred. In order not to waste your boosters you could also play with your old device.
NOTE: I managed to transfer them via iCloud, but I think it was just luck.