The info itself was good, but not meant for mobile
On a side note, the privacy policy is only like, 1 page and very honest. I respect that.

This app helps users learn Japanese grammar through structured lessons. It offers video explanations, grammar notes, flashcards, listening exercises, and speaking practice. Lessons can be downloaded for offline use, excluding video and speaking features.
1.0.2
July 28, 2016
このAppはApple Watch Appのアイコンを表示するようAppleにより更新されました。 Minor bug fixes
MoreNihongo 123 divides learning into Beginner's and Intermediate grades, further broken down into grammar-classified units. This allows users to start at their own learning level and choose specific units to focus on.
Each lesson in Nihongo 123 includes Video, Grammar Note, Flash Cards, Listening (きく), and Speaking (はなす) sections to provide a comprehensive learning experience.
Yes, most lessons can be downloaded for offline use. However, the Video sections and the Speaking voice recognition function require an internet connection.
The Flash Card feature in Nihongo 123 allows users to learn lesson-related words by listening to them repeatedly. It includes options to show all cards, hide memorized cards, or manually sort cards into 'Memorized' and 'Unsure' piles.
Yes, Nihongo 123 features a Speaking (はなす) function that uses voice recognition to check pronunciation. Users can form sentences based on learned grammar and compare their spoken sentences to correct examples.
Nihongo 123 was last updated on July 28, 2016, with version 1.0.2. The initial release date was July 5, 2016, indicating infrequent updates.
Nihongo 123 is supported on iPhone and iPod devices.
Nihongo 123 has a rating of 3.0 stars from 1 rating, suggesting limited user feedback.