i want to make my RICOH THETA X APP. How can I?

Hello guys
I got a Ricoh Theta X. so Actually I want to make my App or PlugIn for my two Ricoh Theta X Camera.
How can i do that?
I want to know if there is an IDE. and How can i start.
Help me!

Choice 1: mobile app on Android or iOS

11 videos that show you how to build the theta-client SDK library and demos

choice 2: run app inside THETA X

choice 2.1 use Android Camera API inside camera

choice 2.2 use webAPI from inside of plug-in with internal local http server

Please post again with what your use case is and what your development background (you already know Android/Kotlin or you want to build mobile with Flutter or React Native or native Swift)