How big games push their content on first launch after Game installation ?

Hi,

I might be asking a very obvious question, However I've seen several games e.g. 'SpongeBob Moves In By Nickelodeon' which takes a long time to download contents from their servers.

I'm not sure if they only pushes 'Assets' to the game or dll/ scripts as well.

I'm stuck in a situation where my game size is large and Asset size of my game is ~1MB, hence I need to download scripts/dll from my backend server. I'm trying to figure out the solution where my apk/iap size is less on the app store. and on first launch it downloads all required scripts/dll from server.

I've already explored all possible solution like AssetBundle, ApkBuilderTool etc, please suggest me a meaningful tool/way by which I can achieve this.

Note : In my game, 80% of the features are generally not required unless requests that, How can I downloads the content if users requires that feature. Just a thought , Like on android I would send a new APK(Full features) to the user which replaces current apk, I know this is not possible on iOS.

please help !