I tried playing it a little bit but it is hard to move around and stuff using my phone, idk how possible it is but I am pretty sure some people out there are smart enough to turn ladder slasher into an app so it is compatible with phones and sorry if this idea was already presented. I feel like it would get a larger amount of players also

You can play LS on your phone / tablet already.

Yea but it sucks lol im down for an app tho besides paul likes making money lol it could end up becoming a hit and may even bring in more players. You have my yes.

It has been suggested and denied every time. A topic was also made in the Ladder Slasher's forum in March 2014.
There are no plans to make an app for LS (or d2jsp) at least for now. Even if it can be possible in the future, it's going to take a lot of time to Paul, and it's not in his priority.
Sorry.

It would make it mobile friendly and his priority should be site survival and its not going to survive off d2 or d3