Whats a better way and mobile app? I tried a few but everything is pretty crap. Then a lot languages like Spanish or Portuguese are often the south American one

Whats a better way and mobile app? I tried a few but everything is pretty crap. Then a lot languages like Spanish or Portuguese are often the south American ones even though they (including duolingo) say they are not, which means it's fully unusable as no one will take you serious.