Launch the app, and click the 'Folder" icon in the upper-left corner to open an audio file.

Choose an audio file you already have to playback.

To identify the words to repeat, to long-press the word to begin with, and then touch to choose the word to end. The word that currently read is highlighted with yellow.

During the repeating, you could stop or quit the repeating mode, by clicking the "stop" or "quit" button.

Current reading position could be controlled by clcik the word to begin with or using the backwardss or forwards controls to jump to a new start(in read rectangle ), it could be 5 seconds or 10 seconds either backwrads or forwards. Controls in green rectangle used to control the reading speed.

Choose the right language for your audio, so that the prioper test could be gnerated accoring to your audio as a reference. So many langauges are supported for your listening practise. 

Click the "gear" like icon in upper-right corner to open the setting page. On the setting page, you could set up the langauges, the recognition window which stands for the portion of the audio to be text-recognized before starting audio playing back. 

When Adding the capabilities on recognizing other languages, you should add the corresponding engines by type "Language" in the search area in Settings, and then choose the Languages you want to add.

Choose the "languages" you want to add, the donwloing would take a moment, depending on your local network enviroments.