In the Android store, Mantano has done something almost as bad. They now have a free version, a mid level pay version, and the full pay version. Apparently they keep taking away features from the free and mid level versions with new updates, forcing some to have to buy the full pay version. It might not be unethical, but it is a crappy way to treat their customers IMO. Plus if you want to use their cloud you have to pay for a separate subscription.