iOS is possibly the most engaging marketplace for app innovators. Apple has an inbuilt testflight tool which allows us to share our apps to known community before it gets released to public. We find this process being really helpful especially during focus group testing.
Apple testflight allows us to invite up to 1000 users external tester. App must pass Beta App Review before you can invite your external testers to test it. The build will be available to them for 30 days after the invitations are sent.
The external testers will receive email directing them to use the TestFlight app on their iOS devices to accept the invitation. TestFlight can be downloaded from the invitation email or the App Store. To continue testing after the 30-day period expires, we have to upload another build. Note: We must include all email address of people who we wished to share app before app submission.