It's a simple English-Japanese dictionary.
It has dictionary data, so you can use it without internet.
You can listen to the word's pronunciation.
If the sound is not available, you may enable the textospeech function by going to the android settings, Lamguage & input,text-to-speech output, then you will get to a list of Text-To-Speech engines like Pico TTS,Google Text-tospeech.You may choose one.
By default, the app searches for words that begin with or is exactly the same as the search input.(pic1)
If you search a word preceded by a % sign, words that contain the search input will be shown.(pic2)
Therefore, if you want to search a word that contains a specific string of characters, you can use the wildcard symbol (%).(pic3)
you can use underscore to match any characters(pic4,pic5)