漢字検定準2級 「30日合格プログラム」 漢検準2級 is an education app by ReCorrect Inc. with 100+ downloads (about 305 estimated). Released Dec 9, 2016. Install growth, rank history, SDKs and ad networks.
From the store listing: “[Android first] A full-scale learning app for passing the Kanji Kentei Level 2 short-term!
Equipped with an efficient learning schedule and a mock exam that changes questions every time!
If you only have this, you don't need a reference book!”