I haven't found anything better than MeshLab. Their control interface is nice and simple; and performance generally isn't too bad (aside from some crashes). I just wish they would allow an option for flat shading (which would make scans look far better), but they don't seem too interested in updating the app.
So far I haven't found anything really great on either iOS or Android, all of them fall short one way or another. You could also use an Android tablet to browse WebGL enabled sites like Sketchfab. iOS does not support it currently in web browsers, unfortunately.
I'd love to hear if you find something, though. Cheers, -Chad