Live Football Streaming App for iPhone

I'm a football enthusiast and need guidance on how to watch live football matches on my iPhone in Portugal. I prefer to use a dedicated sports streaming app to fulfill this need - this could be an app that's free or requires a subscription. To get started, I'd appreciate if you can provide me with detailed steps and recommendations on the most reliable apps to use for this purpose.

I like to watch the football game worldwide, the more game i can watch, the better.