If you are interested in supporting this app and community, you can subscribe to be a Supporter. All billing goes through Apple and you may use any payments accepted by Apple, which includes credit cards, gift cards, etc. We do not accept cash or any other payment methods. If you would like, you can purchase Apple gift cards and use that following the Apple guidelines. Please follow the instructions on the Supporter upgrade screen. If you have any additional questions, we're happy to help. Thank you!