I believe it has been suggested since months ago, but seems that the dev is still busy to work on something else.
Mobile version is a must nowadays as many players like to play with their smartphone including me.
Well, I assume that both of you assuming to have an apps version. Most android phones as of now can access the website through chrome or what browser you have on your phone. Indeed, I think the mobile app version is not necessary and probably it will happen but not now.
Or there is something must be prior to developing than the mobile version.
I think they are confused with what an mobile app is and what a mobile web app is. Basically its difficult getting a mobile app up and running. It would need to be approved by Google and Apple and it will be difficult to get done since anything crypto related is diffult to list and same with gambling. So I wouldn't expect an actual Mintdice App found on the iOS store or Google Play.
However most gambling websites have mobile friendly versions of the website, so when the server detects that its someone trying to access the site thru a mobile browser it sends it to be a more "smaller screen" friendly page and people can easily play dice that way. It would be very difficult to play with the actual full screen where you need to zoom in and zoom out constantly. Bitcointalk forum is actually like that, there is no mobile version and it requires lots of zooming in and zooming out to browse. Its fine on an iPad but difficult if you are trying to read anything on an iPhone.
You got the point but it would be better to have their own app but as said it wont really be that simple and it would takes time.
You've just said about mobile version which is already available on most gambling sites nowadays and yes, its quite hassle to have that
entire full webpage scrolling and zooming in and out. Mintdice team is surely making up some progress on making this site way more better.