Looks lik an amazing app unfortunately there is no free trial period, at least 7 days, not even 24 hours, that most of the serious companies are doing. I never bought anything without a free trial, it's ok if it has higher functions locked but seriously guys??? 3.8 and you are ok with it? Unlock some options so that we can try it at home. I bet that the grade will go up in a moment and also your Profit. Think about it.