Is that even allowed by Apple to collect subscriptions outside of the App Store? There have been many battles about it and Fortnite or some paid email services are at odds with Apple.
Regarding a cross-platform launch, I think launching at the same time considerable increases odds of reaching a critical mass of people joining the hype generated by a launch. In my experience users rarely come back to a place when app was released to a platform they don't have - disappointment factor plays a role - unless they really need it.
Regarding a cross-platform launch, I think launching at the same time considerable increases odds of reaching a critical mass of people joining the hype generated by a launch. In my experience users rarely come back to a place when app was released to a platform they don't have - disappointment factor plays a role - unless they really need it.