Duolingo is accepted by main universities plus it is really cheap and easy at the same time but SAT is expensive and pretty hard so I say go with duolingo.

Go for SAT bruh

Duolingo is like toefl. It just shows your proficiency in English language. But the SAT is accepted by all universities in and also if you have above 500 on the English part you don't need toefl or duolingo. You will also get a good financial aid with your SAT scores.

It's not about being easy, SAT accepted by many universities so go for SAT

Both of them are so eat if u read

Not all uniersities accept doulingo .. so go for SAT or ACT