Horrible, lame app
When opening the first time a popup with a message in Vietnamese comes up with the only option to click ok. Then it takes you to the App Store with another app from the same developer. What a lame bait and switch approach... After each round (the smallest unit of functionality) after clicking 'Accept' to check the selections, it shows 5 second ads (every time). So lame and greedy! The functionality is so limited, that the app is not even worth the space on my phone. Could have been a great idea for learning, but obviously this is developed by a very junior developer. Lame app!!!