[amimetic]

Today is a weird time to get into mobile app dev. The standard 'native' UI frameworks are pretty terrible in terms of how they cope with complexity and their ability to change over time with their dated OOP APIs. Though on both platforms the tooling has been climbing ever upwards towards local maxima.

The best options available for most Apps today (even if just for a single platform) are typically React Native or Flutter. With their React(-ish) UI approaches you can both quickly build and iterate in the future.

SwiftUI is not ready for most uses (I've shipped a small but non trivial app https://apps.apple.com/us/app/pattern-maker/id1484249212 and was surprised by how many bugs there are for very standard things and how many hacks seemed to be required). Jetpack Compose seems to be at an even earlier stage. I expect both will be great but probably not for some time.

[pjmlp]

For those into gamming the standard native UI never mattered.

Then there are several kinds of workflows that are quite doable as mobile Web. One just has to take into consideration that 3G isn't broadband, nor a mobile display a last generation 25" screen.