Best Practices for Fantasy Sports App Development?

Hey everyone,
I'm currently researching Fantasy Sports App Development and would love some insights from experienced developers or entrepreneurs in this space. I'm particularly interested in:

Must-have features for a successful fantasy sports app

Tech stack recommendations

Common challenges during development and how to overcome them

Legal or compliance considerations depending on the target market

I came across this helpful resource: Fantasy Sports App Development Guide, which outlines various aspects of development and monetization. Has anyone here followed a similar approach, or used any of the tools or methodologies listed?

Would appreciate any tips, examples, or lessons learned from your own projects!

Thanks in advance!