In 2020, I started my career in a new company located in the United States where we are using Swift to develop a native iOS application. There are many technologies one can learn to be a mobile apps developer. 

But the question is, what is the best technology in 2020 to learn and start your career as a mobile apps developer. 

Let's figure it out based on jobs, freelance contracts, and jobs in startup companies.

Youtube video for data reference: https://youtu.be/FRzfveWC44I