gwheel

Assuming a checker tool is public it's enough for a teacher to verify classwork, but AI providers having the sole ability to identify generated content with no way to independently verify is not a real solution.

Plus this site advertises a tool to remove this watermarking, so it can't be that hard to scrub out if you're aware of it.

Probably the same as on a Linux desktop now, the browser sites work fine but you won't get 4k or HDR.