What's holding back a mobile port is 2 things: 1) It's written in wxWidgets, which has an unfinished iOS port and no Android port. Even if these ever get finished, mapping the UI 1:1 would probably make for a really bad mobile app, and would have to be adapted specifically for mobile. An alternative route is to rewrite the UI in Qt or OpenGL or something, but that's a huge amount of work. 2) It would need support for cloud storage.