OXDICT for Android is an amazing dictionary for advanced learners. With this app, you will be able to find hundreds of thousands of words and phrases, as well as their meanings. On top of that, there are example sentences you can find for each word you search with clear explanations. 

In addition, it consists of audio you can listen to that will help improve your pronunciation and vocabulary. There are 116,000 sentences to listen to in both British and American English accents. 

The OXDICT Dictionary comes with a simple, clean, and user-friendly interface, which makes the app easier to use.