Yes, you can transfer Clash Royale from Android to iOS. To do so, you'll need to create a Supercell ID. Then, open the Settings menu in Clash Royale on your Android device and select the Accounts tab. Tap the Create a Supercell ID button and follow the instructions. Once you've created your Supercell ID, open the Settings menu in Clash Royale on your iOS device and select the Accounts tab. Tap the Sign In With Supercell ID button and enter your information.