It's very unlikely that a majority of Anki users only uses the iOS app. 1. Anki isn't your everyday application with your everyday audience. 2. The number of

It's very unlikely that a majority of Anki users only uses the iOS app. 1. Anki isn't your everyday application with your everyday audience. 2. The number of people willing to splash $25 on an iOS flashcard app without first having tried it for free elsewhere, is incredibly small.