This sort of thing seems to pop up quite regularly. Optics that defy the laws of physics that you can attach to your phone to make it better than a DSLR. And, bonus, it only costs $48! This time, it’s the StarScope Monocular, which makes some pretty bold and ridiculous claims, as you can see in this video from Computer Clan.
Such companies prey on the inexperience of those who don’t know any better. To anybody who actually understands cameras, lenses and a bit of physics, such “lenses” could never do 99% of the things they claim they can in the real world.