We will go together in an exciting journey through the lands of mobile cross platform development to learn how to use the ancient power of kotlin multiplatform mobile in a modularized architecture and take advantage of such type of heavenly architectures in native mobile development, so we can develop once and share that code/wisdom between Android and iOS, saving time, gold, sweat and even tears. With that single code base, we will endure a fight with the oldest enemies of native mobile developers, lack of testing, duplicated code, etc.