ACT or SAT?

My daughter just took (without studying) a practice SAT and scored a 1390 and an ACT and scored a 31. He wants to study for one of them and take it in August or September. She wants to either get a 1500 SAT or a 34 ACT. Which would be easier to accomplish if she studies?

I would study for the SAT in August.

My kid studied for SAT, but decided to take ACT… You daughter has to decide which test she prefers… but if it were me, I would let her take SAT in Aug, then ACT in September…I am assuming she is a rising junior…