Create library for dynamic ios and android nag-screen

Create a Library which adds a dynamic nag-screen to an ios and or android application Adding the nag-screen to an app should work easily, I want to copy the library to the app and call 1 function in the source code in order to launch the nag-screen at startup of the app. The library should also recognize the country in which the user is located. The nag-screen has to be dynamic which means: - The library will get the title, text , image and link of the nag-screen from a mysql database - The nag-screen can be turned on and off with a 0/1 flag in the database - The title, text and link of the nag-screen depend on the country of the user; there is a default title, text and link in case there is no country specific title, text and link - Example: I add title, text and link for the US in the database for a nag-screen XYZ. I also add default title, text and link in the database. If a user from the US opens the app the title, text and link for US will be loaded, if a user from Germany opens the app the nag-screen with default title, text and link will be opened. Thanks