The GizmoHub lets you call, find and control your Gizmo wearable devices. You'll need to download and install the app on your phone to set up your Gizmos. Once they're set up, you can use the app to: Speak with Your Child. Call your child's Gizmo any time, and your child can use it to call you. Find Your Child. Check the location of your child's Gizmo with just one tap.