Wow, the rich sure are desperate. It's not enough that they can afford the best iPhone—they feel upset that most other people can too. They should have an iPhone just for themselves! And therefore you get garbage like this. Less functional! Outdated model! I should start gluing crap together in my workshop too. I'll charge $15,000! Much more exclusive. And you'll even get an iPhone XS! I could whip together a nice looking website with luxury branding and the whole nine yards to make it seem legit. Then rip off another luxury brand's name and slap it on my product. This is essentially the formula that this company used.
It would be more interesting to see if someone could replace the glass back of the iPhone with a solar panel of similar thickness that could deliver a trickle charge throughout the day. The biggest problem I see with that, however, is that most people either have their iPhone in their pocket all day, are inside most of the day, or even if they have a window and direct sunlight, most people leave their iPhone face up so they can view incoming notifications. Kinetic charging is probably more worthwhile, lol, and will still provide little benefit. You'd be better off with a gold-plated battery case.