How to purchase Testflight? How much does a TF signature cost? !!!

TestFlight Signature is a way to distribute apps using Apple's official TestFlight platform. It allows developers to distribute iOS apps to developers for beta testing before they are officially released on the App Store.

TF signature is Apple's new distribution model TestFlight, which is officially recognized by Apple. A simple understanding of tf on the shelves is the distribution platform developed by Apple for internal testing. Users need to download the TF software first, and then download the corresponding App.
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