I'm focusing on GLEXP topics and not yet switched to fully follow ALXP, so please forgive me if this was discussed already.
I and my wife are started to use Android app called Elevate. We are using it couple o minutes daily and I think it is pretty neat. You can train various skills related to English language and mathematics, and app will adjust to your performance.
I didn't read competition guidelines yet, but from description and information video I believe that this app fits perfectly into this competition and it looks like pretty much working solution. It just lacks social element - only one thing which more or less emulate it is global rank of your performance.
Of course competition might inspire to build better solutions, but maybe there is no such need and problem might just been solved.
What do you think?