There's many of these "native ui-kits" out now. I'm hesitant to call them "apps" because they don't really allow you to interact with the device in any meaningf

There's many of these "native ui-kits" out now. I'm hesitant to call them "apps" because they don't really allow you to interact with the device in any meaningful way. Can't write to SD cards, can't use telephony, can't use camera/nfc/etc... If your app is simple enough that one of these frameworks will work for you, just make a web app. Why do you need a native app if you aren't doing native things?