I assume you've seen the official SAT practice test page,

https://collegereadiness.collegeboard.org/sat/practice/full-length-practice-tests

which has four actual SATs, with answer explanations, scored using a mobile app,

https://collegereadiness.collegeboard.org/sat/practice/daily-practice-app

and links to targeted Khan Academy practice,

https://www.khanacademy.org/sat

All free.

...pronounced like the long vowel and first letter of the alphabet...