Testflight, also known as TF signature, is the most stable iOS signature method at present. It is an officially recognized distribution mode of Apple, with few distribution restrictions, links will not be blocked, and any Apple device can be installed. Moreover, users don't need to click Trust when downloading, so the operation is convenient and the user experience is excellent.
Using the TestFlight application can help developers test beta applications. IPhone, iPad and Apple TV all need to download TestFlight in the App Store.