Best app for learning Chinese

I have been studying Chinese for 4 years and graduated with a minor in Chinese languages at UCLA. I always used Pleco when studying Chinese. I love the multiple dictionaries with many example sentences of each word.

When I have had an issue with the app (only 2 minor issues in the past 5 years), I would email the developer and they would always get back to me within the same day and resolve the issue. They are very helpful and courteous. 5 stars for this app.

Jieming about Pleco Chinese Dictionary, v3.2.14