Do not purchase, I did and I regret it. Paid over $130 for a a years subscription. Mature student, thought it would be helpful. I was wrong. Multi column papers don't import correctly, so are incorrectly narrated. Sections are skipped, punctuation is missed. Reference are read out mid article. Sometimes starts to spell inaead of reads words. You can put documents in folders, but the mobile app does not see anything in a folder so you can't listen to them. For free is OK, but not when you pay.