Unfortunately, the app requires of Internet connection in order to
work. However, you do have the option to download the audio lessons
and save/print the written sections of the course (grammar lessons,
extra vocabulary, or conversation transcripts) for offline practice
In order to download the audio lessons, you will need to right
click on the individual download links (where it says 'Download
THIS Interactive Audio Lesson') and select "Save Target As" or
"Save Link As".
If you find it easier to download all of the Interactive Audio
lessons from the same page, look for the "Download ALL of the
Interactive Audio Lessons" next to the 'Download THIS Interactive
Audio Lesson' link.
I hope that helps!