This has been going around but I figure I'll make a note of it since someone (I do not know nor will I blast it out for privacy sake), but please do not pay through the app on a Apple device. You are charge 30% more than if you paid via the website, but also the money is unavailable to me until 75 days after you pay.
I love you and I love that you want to support me, but I HIGHLY recommend unsubbing and resubbing the next month over the website to save you some money and not have any go to Apple for no reason.