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Official Description:
TVs and Computer Monitors are large, cumbersome devices. Wouldn’t it be a treat if you could use the portable screen you already have with you as an HDMI monitor for cameras, game consoles, computers or other devices?
Say “Hello” to the Orion Video System, a software application from Lux Entertainment and Optics Inc. With a simple USB-C Capture Card, or “dongle” and the free Orion Video System application, getting a big screen is never a big hassle*.
*Requires iOS 17, an iPad with USB-C, and a USB-C Video Capture Card.
Unlike certain previous 'deal' this is actually free, and from a reputable developer.
Regarding the in-app purchase:
Orion is free to download, and Lux advertises it has no ads or tracking. But if you’d like, you can upgrade to Orion Pro for $4.99 and gain some extra features. The premium unlocks “AI-Powered” 4K upscaling for video inputs, a CRT filter for old-school gaming and VHS playback vibes, and picture adjustment capability. So now you can hook up a Nintendo Switch to your iPad screen and warp that Metroid Prime Remastered game back to how it looked on your parents’ basement TV in 2002.
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Edit: nvm post was edited with additional info