• Microsoft Family Safety is a parental control app that lets you manage your kids' screen time and app usage, among other features. 
• Family Safety is free but requires everyone to use a Microsoft account, and there are premium features available with a Microsoft 365 subscription.  
• The parental controls work across multiple devices, but browsing can only be filtered using the Edge browser.

Microsoft Family Safety is more or less just what the name implies: It's Microsoft's family safety and parental controls app that you can use to manage your kid's screen time and device usage. 

To use the service, you need to install the Microsoft Family Safety app on each mobile device you want to manage, and every family member you want to track needs a Microsoft account. 

To use Microsoft Family Safety, you'll need to install the app on each of your family member's devices. You can install Microsoft Family Safety for Android or for iOS. Start by installing it on your mobile device as a parent and sign in to your Microsoft account.

Unless you've already created a family group, you'll initially be the only member of your family. Tap "Add a family member" and enter their email address associated with their Microsoft account. If your child doesn't yet have a Microsoft account, tap "Create a child account" and follow the instructions to create one for them. They will get an invitation to join your family group; if needed, help them accept the invitation and get started with Family Safety.