This app was mentioned in 4 comments, with an average of 1.50 upvotes
Try StartFromZero_Japanese app or the Beginner Japanese app to learn on your own some basic Japanese words and phrases from scratch on your own.
As a start, you could make use of free flashcard tools like the StartFromZero_Japanese app and the Beginner Japanese app to easily start learning on your own some of the basic Japanese words and phrases from scratch.
If you're a beginner, try Beginner Japanese app or Startfromzero_Japanese apps. If you are further along, try JLPT Locker app.
https://play.google.com/store/apps/details?id=com.shex.startfromzero_japanese
https://play.google.com/store/apps/details?id=com.shex.beginnerjapanese
https://play.google.com/store/apps/details?id=com.shex.jlptlocker
I think you are pushing yourself too hard. Take it easy. Spread the load over several days. Learning language is not a sprint but a marathon. Its pointless if you remember the whole 2 pages for a day but forget a week later.
For practicing or learning Japanese vocabulary, I'd suggest the following apps. They are pretty effective.
https://play.google.com/store/apps/details?id=com.shex.startfromzero_japanese
https://play.google.com/store/apps/details?id=com.shex.beginnerjapanese
https://play.google.com/store/apps/details?id=com.shex.jlptlocker
Take it easier on yourself.