As I know it is a bit hard to get a gambling application into PlayStore. There are some requirements to be met before a gambling application can be accepted and listed on PlayStore.
It is also only allowed for few countries so I do not think it is worth the verification process. One other important thing is that the casino should have a valid license as well.
If players are worrying about security, simply play the game on mobile browser. IMO the number of gambler who use browser is much more higher than who are willing to use an app.
I just don't know how you find it difficult to have gambling applications on the Playstore while I have these android mobile device gambling applications. Maybe you're right that it still depends on which country you belong to. But I think this Luckydice can provide the requirements for them to enter their app on the Playstore. After all, there are others who actually prefer the browser to play especially the laptops or desktop users, but only smartphones, of course, they want the app itself as much as I do.
Google Play requirements for gambling are not that simple and very limited to a few countries. We are trying to submit the game to Google Play and AppStore.