Learning games/apps for kids?

Hi,

This is little off topic I guess but I needed to ask. Please reply if you can help. My child is in grade 6 and obsessed with online games and mobile games. I am fine with that as long as the games are productive, learning or educational. I pampered her with few games on mobile like math games (https://logicroots.com/math-games/mathaly/start/), vocab games (http://pbskids.org/games/vocabulary/) and much more. She has played it all. Please suggest a learning game/app for her.

Thank you