I am incredibly frustrated with the Test Flight app due to its flawed payment system setup. Despite having a payment system already in place and verified, I encountered an infuriating issue while attempting to download the app on both my iPhone and iPad. The app demands that I add a payment system, even though I had already set up and verified one. This flaw is not only inconvenient but also illogical, as an app of this nature should require a payment structure to be established before the download, not after.To begin with, I found it incredibly aggravating that the Test Flight app insisted on a payment system setup, especially when I had already gone through the hassle of configuring and verifying one. The app's requirement to add a payment system before downloading is baffling, to say the least. It feels like a redundant step that only serves to waste users' time and create unnecessary frustration.Moreover, encountering this issue on both my iPhone and iPad indicates that it is not an isolated glitch, but rather a fundamental flaw within the Test Flight app's system. It is highly disappointing that such a basic functionality has been mishandled, preventing users like me from accessing the app. I expect better from an app that is intended to facilitate testing and feedback for developers.The lack of clarity regarding the purpose and necessity of the payment system adds to the frustration. If a payment structure is required, it should be explicitly stated before initiating the download process, not sprung as a surprise obstacle. Users should have the option to evaluate the app's payment requirements beforehand and decide whether or not it suits their needs.Overall, my experience with the Test Flight app has been exceedingly negative due to its flawed payment system setup. The unnecessary demand to add a payment system despite already having one in place, along with the lack of clarity and logic in the process, has left me feeling utterly frustrated. I hope the developers address these issues promptly to ensure a smoother and more user-friendly experience for future users.