I do the majority of my music composition on a desktop but it can definitely be nice to bring my 37-key midi controller + iPad for doing stuff on the go.

It's also not entirely uncommon for an App Store synth to offer both an iOS and a native Mac version so always check the store description to see if its universal. The ability to seamlessly bring your tracks over to a more full-fledged DAW on your Mac is really nice.

Example: Minimoog Model D Synthesizer

https://apps.apple.com/us/app/minimoog-model-d-synthesizer/i...