Limited by seeming lack of support
There are no clearcut instructions. Additionally, you can supposedly get rid of the ads by an IAP but there is no explanation as to how to get to the appropriate page. When I try to go to App Support or the Developer Website all I get are error messages. There seems to be no way to reach support or the developer. Therefore, while the app seems pretty good (and I might give it 4-5 stars) I would hesitate to recommend any app if support appears to be a problem and can only give it 2 stars (the adds are annoying).