I purchased this app along with several others covering similar subject matter. Every app has its pros and cons, but the cons grow mightily in annoyance when the developer refuses to respond to emailed inquiries. If you think there is any chance, even an obscure outside shot, that you might someday, somehow, need help with an app, dont buy this one. No doubt you will be out of luck. If I could give it zero stars, I would. Other developers are far more responsive to customer queries...