Learn Polish - 15000 Words is a free educational app that will help you become fluent in Polish. 

 Each lesson consists of a written text that is read aloud, followed by a list of suggested vocabulary that includes all the words you have to know in order to understand the text. 

After reading and memorizing the text, there is a practical section where you can apply the vocabulary to different text types and a section where you can play an audio file and pronounce it correctly.

Learning Polish - 15000 Words has all the basic elements that are necessary for learning a language: vocabulary, and pronunciation practice.

This is a great learning app for both children and adults.