The idea is that you can have your speaker notes on your iPhone while presenting your PowerPoint presentation.
PowerPoint pptx files are compliant to the Office Open XML format (OOXML) and the speaker notes text is included in XML-format.
This app can import a pptx file, extract and parse the relevant XML information and create a deck of cue cards based on what is included in the PowerPoint file.
Note: No pptx files are included in the app. I.e. you will need to import a pptx file into the app before it can be used.