I recently signed up for the payed version of Duolingo because I heard that you could download lessons for offline use. However, I can't find this feature or how to use it. I'm going to be on a long flight for several hours and I was hoping that I could stockpile some lessons to make the flight go by quicker. If someone could help me out that would be much aprreciated.
I think that option is planned for the short/medium term developments. I don't think it is currently available. The only chargeable thing I have in my store is a monthly charge to get rid of adverts.