How to purchase TestFlight internal testing? How much does it cost to list on testflight? !!

Our Apple tf sign adopts the principle of one package and one number, instead of multiple applications sharing accounts, to ensure stable listing, long-lasting, no loss of sign, no account ban, one installation, and stability for at least three months. Using official servers, download speed is fast and distribution is efficient.
TG consultation is welcome, thank you.
@AsignAgent

Tags/Keywords: iostf signature, iosTF distribution, tf signature on the shelves, TestFlight distribution, strength tf signature
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