I've disabled auto update for all apps on my android. However, Facebook and Messenger still updates automatically. This itself raises suspicion of Facebook's control over my phone.
Sometime back I wished I had a light weight CMS that can serve your content and allow you to program sections of your content so that you can make it more dynamic. For example, I can have something like this as the content:
The sum of @Var1 and @Var2 is #Sum
and then we can program #Sum (we call this an expression) to return the sum of @Var1 and @Var2. Once I pass the values for the variables @Var1 and @Var2 to API, let's say 1 and 2 correspondingly. Then the api would return you the content as: