This program is phenomenal. It lets me see, on one screen, how the site will look on iOS, Android, tablets, small screen laptops and large screen laptops, all at the same time, with synchronized scrolling.

Additionally, it allows me to use inspect to see the source code in mobile mode where relevant, on my PC.

This is a huge time saver and has already showed me some issues that I never would have picked up without a client complaint.

Kudos to the developers. One of my best purchases this year.