I need a website with an app

Guys, can you recommend a betting site and casino with a user-friendly app? I'm often on the road, so playing through a browser isn't always convenient. I'm looking for a platform that offers sports, live betting, and a casino, all of which are well-implemented in an app. I'm tired of installing apps that lag or crash. If you use something truly convenient, let me know; I'd be happy to hear your advice.