Nowadays, many people play casinos from a smartphone, but not all apps work stably. Some lag, and in others, important functions are not available, for example, withdrawal of funds. I once came across a casino where you couldn’t withdraw money through the app, you had to log in from a PC. Since then, I only choose those platforms where the mobile version is really convenient. You can find a list of the best mobile casinos on
this link - I recommend checking it before registering.