I looked over the reviews on this site about Lumosity and got to say. Please let me sale you a car. If you took 4 sec to read the billing statements before purchasing the product, you would have clearly seen what the billing cycles are, and the options if you choose not to enroll in the monthly or yearly subscriptions.
Has for me, I like this product, I've tried other free apps and for the most part. They tent to be the same mathematical questions, no shapes... etc.
I'm only four weeks into the service and seen improvements with my way of thinking. Now, I and hope no one expects these games to make you a genius, but should help improve daily thinking requires.