In order to transfer your game progress between Android and iOS devices, perform the following steps:
Connect your game progress to Nekki ID on the device with your main progress. To do this, go to the game's Settings > Account, and tap on the orange "Connect" button.
Then choose your preferred means of connecting. You can choose one of three types of connection:

• Your email: enter your email address into the field. After that, you'll receive a confirmation code at that address, which you will need to enter in the game.
• Google account: after you press this button, a webpage will open and you will need to log in to your Google account.
• Apple account: after you press this button, a webpage will open and you will need to log in to your Apple account.

ATTENTION: after successfully logging in to your account or connecting via email, you have to press the "Continue" button.
Your progress has now successfully been linked to Nekki ID.
Now launch Shadow Fight 4: Arena on the new device that you want to store your main game progress on.
Go to the game's Settings > Account, and tap on the orange "Connect" button.
Then choose the same means of connecting that you used previously on the device with your main game progress and complete the process of logging into your account.
ATTENTION: after successfully logging in to your account or connecting via email, you have to press the "Continue" button.