If you have the program with health you cannot practice as long as you want because 6 mistakes and you are locked out for 6 or 7 hours as far as moving on goes. My wife and I loaded the program on 2 different IPads within a short time of each other and I have (HATE) the health feature and she doesnt. As a result she can practice for an hour or more whereas I am sometimes locked out after 10 or 15 minutes due to 6 mistakes. It seems like a sneaky way to force people to buy health to use the program but in my world that NO longer makes it a free program. Way to ruin a good language program DuoLingo. Maybe enough people will complain about this scam and it will be removed. I have certainly stopped recommending to friends.
Ladedomay about Duolingo Learn Many Languages for Free, v5.0.15