TestFlight, acquired by Apple in 2011, revolutionized beta app distribution by eliminating the hassle of managing beta builds and simplifying the process for testers. It offers a simple approach to managing app beta builds and testers, allowing up to 100 apps and unlimited builds to be tested simultaneously. TestFlight has two types of testers: internal and external. Internal testers are limited to 25 members from an App Store Connect team, while external testers can reach up to 10,000 users via email or a public opt-in link. The platform allows for dogfooding, where developers test their app internally before releasing it to external testers. TestFlight also offers open beta testing, which provides a final safety net before a public release and helps identify potential issues. While TestFlight has its pros, such as being integrated into App Store Connect and offering A/B testing of unlimited builds, it also has limitations, including the 25-tester limit for internal testers and the need for a beta app review that can take up to 48 hours. Additionally, Instabug is mentioned as a top alternative for bug reporting, crash reporting, and user feedback in mobile apps.