I enjoyed learning with Duolingo on and off but didn't enjoy the constant ads. So I signed up for Super Duolingo for $83/yr. The ads didn't go away so I thought I had done something wrong and later I signed up (again, as it turned out). Duolingo allowed me to have overlapping paid subscriptions through the one itunes account and still showed me ads!! Zero response to emails. I've now cancelled my subscriptions and switched to Babbel.
