Mobile-first online casinos are designed with your phone in mind, using HTML5...

https://devinsmasterperspective.opalvector.com/posts/how-do-i-avoid-sketchy-mobile-casino-sites

Mobile-first online casinos are designed with your phone in mind, using HTML5 to let you play right in your browser without extra apps. They load faster, so you spend less time waiting and more time playing