When are native libraries needed?

[psparago]

I am a little confused about when native libraries are needed. Are there a set of components that require native libraries? If so, what components?

I already have to build a development client for my app, so it's really not an issue, but I'm curious as to what the process is for repeatedly building an RNUILib app with native libraries. Will a prebuild update the native Android and iOS directories?

I am eager to switch to RNUILib and I am particularly interested in the Keyboard support. (I'm developing a special needs chat application that will use AAC symbols). And, on this note, any advice on how to select AAC symbols perhaps not using the Keybard are welcome as well.

However, after the sudden native-base abandonment, I'm a little skittish about adopting a new UI library. I've gone from react-native, to react-native-elements to native-base so far, so this will be the 4th rewrite for UI components.

Any and all guidance will be appreciated.