Native, Hybrid apps : iOS apps will not run on Android and vice versa

https://www.mobiloud.com/blog/native-web-or-hybrid-apps/

Most web apps are written mainly in Javascript
Native apps , same language used in operating system development. 
For ex:  
Swift or Objective-C for iOS apps  - Xcode IDE
Java is used to write native Android apps  - Android Studio IDE
C# for the most part for Windows Phone apps.

Building Cross-Platform Native Apps
     Xamarin, React Native, Titanium, and Google’s Flutter

Hybrid Apps:
You install it like a native app, but it’s actually a web app on the inside.