Data was corrected.
1. There is a detailed explanation in each problem according to the reach of the JLPT N4 (linguistic knowledge) character vocabulary. A learner can grasp a point easily.
2. As well as adding to the character reach of N4, the explanation is being displayed that a hint is pushed even if it isn't understood while practicing. You can go to maturity so that it's done a circle and penalty come out right now without an unnecessary thing, and when repeating it and practicing.
- July 10, 2016 Initial release
- July 28, 2016 New version 2.0
- August 11, 2016 New version 2.1
- June 15, 2019 New version 2.2.1
- June 15, 2019 Price increase: $5.99 -> $7.99
- June 16, 2019 Price increase: $5.99 -> $7.99
- August 17, 2019 Price increase: $7.99 -> $8.99
- September 11, 2019 Price decrease: $8.99 -> FREE!