Love his app! It does so much!
It has a great dictionary with useful functions and info, eg, JPLT ranking for certain words, kanji stroke order, example sentences, editable search history and much much more.
It also has a cut and paste text function which adds furigana, shows words highlighted before, and has a glossary.
On top of all that there are study cards and all sorts of other things.
Amazing app for free. Worth every penny if it were a pay app!