@pgyc Our smart devices can only be controlled form one TP-Link ID account. So what you would do is download the Kasa app in the iOS phone, and log in with the same email and password you used for the Android phone. All the smart devices associated with that TP-Link ID will automatically pop up, and you both can control them at the same time. When the status of a device changes the other side will see that reflected on their app in real time.