VapourSynth is designed to be cross-platform compatible. Can it work on Android and iOS and be embedded into an app?
Also, is there any plan to add audio support to VapourSynth? If it could be used for real-time audio processing and playback on mobile devices, I think that could be useful.
I have android now but I used to try IOS also and I can tell that I like android more. Its more convenient for me to use it. But its only my personal opinion.