Apple officially recognized the testflight fee for internal testing distribution channel on the app...

APP downloaded through TF signatures can be used up to 90 days. The 90 days here means that after the product is released, Apple will provide 90 days of testing time, and the app that has been downloaded after 90 days will also prompt that it will expire and click and crash. The download address will also be invalid. If the mid-time product is re-listed and updated, the download address will re-owned 90 days of validity, and users who have already downloaded will re-owned 90 days of renewal. So theoretically, if you keep releasing new versions of iosTF signatures and customers can continue to use them if they download and update them within 90 days.
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Tags/keywords: iosttestflight distribution, IPAtestflight signature, powerful tf signature, reliable tf signature, TestFlight internal testing
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