The free SAT prep app you'll actually use.

Swipe through SAT questions.

Loved by 70,000+ students

Trusted by students who got into

Stanford, Harvard, MIT, Yale, Princeton, Cornell, UC Berkeley, University of Chicago, Duke, Johns Hopkins, Caltech, Carnegie Mellon, Dartmouth, Georgetown, Georgia Tech, NYU, Brown, UPenn, University of Michigan, Vanderbilt

Why I built Dolphin

I built Dolphin because I saw what SAT prep was doing to my younger sisters. They were using random tools, trying to care, and still ending up frustrated.

Built for the ten minutes students actually have

Practice at your level

Questions meet students where they are and keep the next step clear.

Learn right after a miss

Every answer turns into a chance to understand the concept while it is fresh.

Use the tools that matter

Scratch work, Desmos, review, and explanations stay close to the question.

See what is improving

Students can see where they are getting stronger and what still needs work.

Frequently asked questions

What does Dolphin help students prepare for?

Dolphin helps students prepare for the SAT with daily practice, guided review, and a study loop that keeps each next step clear.

Will the iOS app stay free?

Yes. Dolphin will stay free on iOS because every student should have a useful way to practice.

Start studying anywhere

Get dolphin on your favorite device and take your SAT prep with you. Available on iOS.