One of the Best API for Weather App. Review and let's Discuss

I have seen different API’s for weather app, I think this the best one to proceed for beginners.
Advantages:

  1. More accurate

2.Icons can also select directly from JSON without manually icon links.

https://www.apixu.com/

Weather APP:

-> Promise and then plays main role in this project. (Learn it before Project start)
How to write Ajax Promise and then. video to learn