In addition to the absolutely "well known" market share and revenue numbers listed in the sister comment, because many of my users care deeply about both securi

In addition to the absolutely "well known" market share and revenue numbers listed in the sister comment, because many of my users care deeply about both security and privacy--which this absolutely is: Monero and Zcash are both called "privacy coins" and not "anonymity coins" for a reason... being able to avoid any third-party (including Apple or banks or governments) from knowing who you transacted with is different from building systems where the person you are transacting with doesn't know who you are (even if they are related)--I would expect more than the usual share of users for such a product to be using iOS, a decision that even I tell people is a smart decision... due to the better permissions and capabilities/entitlement systems and due to the longer support and seemingly better care towards security in general, and not at all due to the App Store's centralized BS. FWIW, though: 1) even if you expected the vast majority of people to be using one system instead of the other, you can't build a communications platform or payment system or ecosystem generally at all that simply cuts them out as it causes problems for the people and companies trying to adopt it... if you build a platform for decentralized apps that doesn't support iOS or a chat system that doesn't support iOS or a payment system that doesn't support iOS, well, you now have to convince everyone else in the world not to support iOS: your hands are frankly tied here.