Kanji Graph is a smart offline Japanese-English dictionary. It is free and ad free. You can search words by rōmaji kanji and kanji parts that you can quickly select from the search results (see a demo here https://youtu.be/nb3NG9W6iDY). You can also draw kanjis that will be recognized independently of stroke order or stroke count.

You can study and review word readings in a graph where nearby words share common kanji readings. All your actions (in the graph quiz and in the dictionary) will update your level for each kanji reading.

A downloadable module contains example sentences from the Japanese Wikipedia and the 小説家になろう website. The user level for the different kanji readings is used to show easier to read sentences first.

Detailed information about kanjis and any part thereof can be displayed: readings meanings common words grouped by reading and containing kanjis.

The dictionary also includes Japanese definitions from the wiktionary project. This includes synonyms antonyms and etymology.