Foreign language study using backgroud picture

I have finally get the courage to release this project. A language studing help site that use your smartphone's wallpaper.

Cause I want to learn Japanese lanuage, but I cann't remember the Hiragana. So I write a program to generate a picture to list all hiranana, and set it as a background wallpaper on my phone. When I forget a hiragana, just switch to main screen of my phone.
It works. So I put every lession content on picture and set it as wallpaper on lock screen and main screen.

Maybe It is useful for some people who want learn a foreign language. Especially for those like me didn't have a well remember ability could learn language by pictures.