Adam Stepinski, creator of Hyperview and co-author of Hypermedia Systems, explains how and why developed Hyperview.

Hyperview lets you create a shell for your iOS/Android app, then populate it using XML and hypermedia, htmx-style inspired concepts.

Hyperview is extensible, so you can find or build your own plugins.

Links discussed:
Website: https://hyperview.org
Hyperview Github Repo (best place to ask questions): https://github.com/instawork/hyperview
Discussion about client-side validation: https://github.com/Instawork/hyperview/discussions/332
Examples of defining multiple behaviors: https://hyperview.org/docs/reference_behavior