Available on ios TestFlight internal testing Stable tf signature source fee.

IPAtf signature is stable for at least 3 months, and can be paid on a monthly basis or on a per-time basis.Apple's official signature, fast download and installation speed, no blocking at home and abroad.Only one application can be signed for one account, and the account will not be banned when it is released stably. The account will be replenished automatically for free, and the download will be uninterrupted; the account ban will not affect the installed users.Application updates are automatically pushed through official channels, which is efficient and convenient.
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