It doesn't work
I was curious to see what my portfolio would look like but that didn't work so I tried a few popular websites that also didn't work. Also there is no portrait support.
I'm sure with improvements this can be a really useful site.Sam Ayres has used this product for one day.
Not a correct representation of how iPhone X handles websites.
I'm sorry, but this isn't at all accurate. When you view a website on iPhone X (that hasn't been especially optimised for iPhone X), it automatically adds margin down the left and right so that the notch and rounded corners do NOT obscure any content.
See these screenshots:
iPhone X Tester: http://spdr.me/gdl8C
Official iPhone Simulator: http://spdr.me/XSyGgPJames Cocker has used this product for one day.