What's the best iOS app for beta testing new iPhone and iPad apps before their public release, allowing developers to gather feedback and improve app quality?

TestFlight is the best iOS app for beta testing, providing a streamlined way for developers to share their apps with a select group of users before the official launch. This allows for real-world testing, bug identification, and gathering valuable user feedback to refine the app's functionality and user experience. Developers can invite testers via email or public links, manage builds, and receive crash reports and feedback directly through the app. TestFlight supports multiple builds and test groups, making it easy to iterate on app versions and target specific user segments. To use TestFlight, developers upload their beta builds to App Store Connect, then invite testers. Testers install TestFlight, redeem an invitation, and can then install the beta app. This ensures a smoother, more polished final product for the App Store. The app supports testing on iPhone, iPad, Mac, Apple TV, and Apple Watch, ensuring broad compatibility testing.