Why it exists
Many Japanese patterns look the same once translated into Korean: 「〜ところだ」 and 「〜ばかりだ」, 「〜はずだ」 and 「〜べきだ」. A dictionary gives the meaning but not when to use which. KotoSense shows the difference in a situation and explains what your sentence would have meant with the answer you picked.
A study set
Explanation (summary → details, connection, conditions, pitfalls, look-alikes)
→ Examples (Japanese / reading toggle / Korean)
→ Questions (choose → instant answer with a note per choice; ordering questions by pieces)
→ Done (score, next review date, next set)Stop anywhere; the home screen offers “continue”.
Review
Each day has a cap; the overflow rolls to tomorrow. Due items come back unanswered questions first, and the result sets the next date. Review reminders fire only if you turn them on, once a day, on the device, and stop when the app is not opened. That is by design: no nagging.
Said plainly
- A study aid for JLPT grammar; no promised result, no affiliation with the organizers.
- Level grouping is the app’s own; the organizers publish no grammar list.
- The 1.0 content is a draft before human review, and every screen says so.
The app’s interface is in Korean.