If they can maintain security before downloading the application and ensure it is secure, they can use it. But it seems that for the crypto casinos, we know it is rare that they have the application and are more actively running the site directly. Indeed, several casinos have launched their applications to make it easier for users to play gambling using their applications. However, compared to other casinos, there may still be more casinos that do not have applications. So the most important thing is that we can get a trusted casino that is truly safe and has an application that can help us play gambling using phones.
Security is everything, when we are in a casino or in an exchange the first thing to guarantee is security, obviously the biggest crypto hacks occur through cookies or temporary files, and the apps are the biggest vulnerability of the people, because most of them are on the phone, it is very difficult for them to access the PCs and have the private keys and public keys, because most of them don't even have that on the PC but on pendrives or in secure sites, so That is not the case on a phone, it is at hand, so a casino app would have to have a phone autoload to erase all traces.
Mobile phones in principle have a number of specific security problems.
First of all, the option of losing it or if your phone was stolen from you, or even if you were robbed, your mobile phone was taken away and they require access and a password.
Stealing your money from casino applications or exchangers on android without such brute force, and with the help of hackers, also seems to me more likely and may well be done really simply because of the carelessness and stupidity of certain people.
And, of course, because of the files left in the phone, which an ordinary person, far from programming, knows nothing about. And he does not even suspect that the phone can be hacked by intruders.
And by the way, I think few android application developers care a lot about 100% security of their applications for an inexperienced user. So of course desktop computers have a much higher level of security.
At least that's how it is now, I think.