If you enrol in the classroom version of Duo (which I originally did to get back the old style tree) it is firstly, free. Secondly - you can be a single partici

If you enrol in the classroom version of Duo (which I originally did to get back the old style tree) it is firstly, free. Secondly - you can be a single participant. Thirdly - no ads. I even forgot there were ads because I haven't seen one since I enrolled - in eluding the annoying self promotion ads for Super Duolingo. I have a 1631 streak at the moment, so it is saving me quite a bit of time not seeing ads. It is not my loop hole, so I guess it is just something I found by accident.