A free program for Android, by Mobidic.

Dicionário Língua Portuguesa (DLP) – Learn Portuguese Language is a dictionary application to improve your vocabulary. It can also be used as a learning tool to help you to improve your reading and writing skills in Portuguese language.

With over 35,000 words, you can search for the definition and spelling of any word you do not know.

The application also has the Word of the Day, which will help you to learn a new word every day.

To facilitate interaction with the dictionary, you can also set the font type and font size to make it easier for you to read the texts.