TestFlight opens beta app testing on iPhone and iPad

The Hacker News submission is framed as a Show HN for "Anvil, offline LLM chat and SDXL image generation on iPhone", but the linked destination is a TestFlight public invitation page, and the readable body is Apple's general documentation for testing apps with TestFlight. That documentation covers practical mechanics: developers invite testers by email or public link, testers install TestFlight on their device, and each build remains available for up to 90 days. It also lists platform-specific requirements, such as iOS or iPadOS 16 or later for iPhone and iPad apps, macOS 13 or later for Mac, and visionOS 1 or later for Apple Vision Pro. The page describes how testers can send beta feedback, including screenshots and crash information, and how they can leave a reason for declining an invitation. For readers hoping to learn about Anvil itself, the article does not include a description, feature list, or release detail for the app. The practical takeaway is that the link is a beta-testing entry point, not a product announcement; the documentation itself is a reference for how TestFlight invitations and beta builds work.