How to create a JUCE library for an existing native Android / iOS app?


I’m totally new to JUCE, and I would like to implement it in an existing mobile app (both Android and iOS) using C++.
As per the official documentation (JUCE: Tutorial: Projucer Part 3: Choosing the right Projucer template for your application), it looks like the only solution for me is to create a static/dynamic library.
Should I choose static or dynamic? (I would go for static, but I’m not sure)
Also, do you know any tutorial on how to create and implement a JUCE library in a native Android and / or iOS project?