DESCRIPTION
For everyone who purchasing / subcribing with iPhone, Apple forced patreon app to use their in house iOS purchase system. Which is adding 30% tax to your payment.for example my supporter is at US$4 + 30% apple tax + payment tax.So if you have iPhone, I suggest you to renew / subscribing through other device, either PC (windows / linux), MacOS (imac/macbook), or android device, to avoid apple tax.
https://news.patreon.com/articles/understanding-apple-requirements-for-patreon