Apps now allow you to access your home network from a mobile device. Before you do, be sure that some security features are in place.
Use a strong password on any app that accesses your network. Log out of the app when you’re not using it. That way, no one else can access the app if your phone is lost or stolen.
Password protect your phone or other mobile device. Even if your app has a strong password, it’s best to protect your device with one, too.
Source: https://www.consumer.ftc.gov/articles/0013-securing-your-wireless-network