Education apps in today's App Store charts in the same countries as this app.
Duolingo – языки и шахматы
Duolingo
AnkiMobile Flashcards
Anki Software, LLC
회독JLPT
LEE YONGHEE
박코치 학습기
Seokmin Lee
오르조: 기출문제, 수능·내신·공무원·자격증CBT·토익
Sling Inc
JLPT Tango Plus - 일본어 단어장
Locale Labs
Mensa Brain Test
Barnstorm Games