It is an application to learn hiragana by answering hiragana from 3 choices from illustrations and voices.
By giving priority to letters with many mistakes, we are trying to remember words that we are not good at quickly.
You will get points for answering one question correctly, and when you accumulate points, you will get a random vehicle card, so I try to remember it with a goal.
You can always see the collected cards from the card list.