The items in your game (lives, coins, and boosters) are stored locally on your device (computers, tablets, and mobile phones). At this time users cannot transfer items across multiple devices, as this caused game stability issues.
If you want to ensure you get your coins, lives, or boosters on a specific device, make sure you use that device when you first collect or purchase them. For example, if you'd like to accept lives from a friend and want them to show up on your mobile device, you'll need to accept these lives on your mobile device. This includes coins and boosters as well. If you purchase them on your mobile device, they'll only be available on your mobile device.
If you are switching to use a new device, please contact our Support team and we'll be happy to assist you.