Now you can gain even more valuable feedback by inviting up to 10,000 users to beta test your apps before you release them on the App Store. TestFlight makes it simple to invite testers using just their email address and lets testers quickly provide feedback within the TestFlight app.
The TestFlight app allows testers to install and beta test apps on iOS, tvOS and watchOS devices. Testers must receive an invite directly from a developer first before they can begin testing with TestFlight. Once invited, testers can redeem invitations in TestFlight to install, test, send valuable feedback, and get updates for the beta app.
You can download TestFlight from the App Store for free.