Are there ways to find out what the mobile application is written on?

Question

Android

Let's say you liked the application (available for iOS and Android), it looks like they use UIWebView (that is, regular html is loaded), but how can I find out more precisely? unfortunately support is not very talkative about this.
Can pull out apk under Android and somehow analyze it?
Suspicions about React native - everything is very smart, but maybe something simpler.
What is the current cross-platform development trend?

Answer 1

You can just poke and see problems or beacons. Not native scroll - react. View requests - if there are js scripts / fonts, then it is clear that the web. You can look for problems in the native SafeArea - if there are, then the native (look at the scroll indicator)
Show it to an experienced developer, he will say.