Mobile browser games can feel just like apps because they support portrait...

https://emilyscoolnews.urbanvellum.com/posts/how-do-i-make-an-html5-game-feel-like-a-native-app-on-iphone

Mobile browser games can feel just like apps because they support portrait mode, so you can play comfortably on your phone. They load quickly thanks to smart caching, meaning less waiting time