One application domain with a largish number of iOS apps is electronic music. The latency (sample buffer size to prevent drop-out due to preemption) on Android

One application domain with a largish number of iOS apps is electronic music. The latency (sample buffer size to prevent drop-out due to preemption) on Android is too high, so mobile music production gravitated to iOS. E.g. - the latency on a $160 iPhone SE is still about half that of a $700 Pixel 2 phone.