Android lets you "return" a full app within 24 hours for a full refund. You don't have to guess if it will do what you need, you can try it and see. I guess you are out 99 cents on your credit card for a day, though, which will probably annoy someone here.
Well they probably would just hold the charge until you've held the app for a day. Otherwise there would be fees for apps that people never kept.