I don't have a cell phone so the smart controller was critical to my decision to buy a drone. If you order the SC when you order your drone, it is only $400 US. I have found it to be very readable in bright sunlight.
Amazon sells a nice solution for the controller that solves the problem. Cost is $10 US and includes all the necessary parts. Here is the link:
https://www.amazon.com/gp/product/B07MY3N45N/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1