How to purchase TestFlight internal testing? How much does iosTF distribute? !!!

TF signature, officially known as testflight signature, is currently the most stable signature method. Apple listing is a distribution model officially recognized by Apple. It has few distribution restrictions, the link will not be blocked, and can be installed on any Apple device. Moreover, users do not need to click trust when downloading, it is easy to operate and the user experience is very good.
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