iOS stopped having this privilege a few years ago. Android and iOS are about equally profitable these days.

And even if they were not, you will get about five times as many users on Android than you will on iOS, there are many ways to monetize these users once you reach such a volume.

Part of the failure of Vesper was due to Gruber's infatuation with Apple (on top of the fact that a note taking app is just not that compelling enough in 2016).