One place to learn, practice, build vocabulary, fix weak spots, and actually improve.

Lessons, practice, vocab, and full mock exams — one connected path, built by students.

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1,192 original questions · 1,318 vocab words · $0 forever

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SAT prep shouldn't require a subscription.

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Thirty checkpoints walk the whole test — no guessing what to study next.

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Practice it. For real — try this one.

Original Digital SAT questions with explanations that actually explain. This isn't a mockup — answer it.

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TransitionsEasy

Aspergillus oryzae, the mould behind soy sauce, miso and sake, was declared Japan's national fungus in 2006. Many everyday foods rely on controlled spoilage. ______ soy sauce begins as a mash of soybeans and wheat that molds, ferments, and ages for months before it is pressed and bottled.

Which choice completes the text with the most logical transition?

Pick an answer to see the explanation.

Remember it.

Flashcards for the words the Digital SAT actually tests — plus a daily 10-word race against everyone else.

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Know what needs work.

Private stats show your weak skills and hand you the next set to fix them.

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Stuck? Get a real person.

Free one-on-one tutoring from trained student volunteers. No cost, no catch, no proving you "deserve" it.

How tutoring works

Why free?

Because test-prep access tracks family income, and we think that's fixable.

The research, the receipts, and our story are all public.

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Fair questions

Is it actually free?

Yes — everything: the Guide, the question bank, vocab and Daily Match, mock exams, the error log, study plans, bookmarks, Desmos lessons, the resource library, and one-on-one tutoring. No subscription, no trial, no locked tiers, no credit card field anywhere on this site. Why we do this is on the Mission page, with receipts.

Do I need an account?

No. Everything works as a guest and saves privately on your device. A free account only adds syncing across devices and the Daily Match leaderboard.

Who builds this?

Students who took the Digital SAT. Every question is original and machine-validated; every claim on the Mission page is cited.

What happens to my data?

It stays yours. Study data lives on your device (or your own protected row if you sign in), is never sold, and can be exported or deleted any time. The privacy page is written in plain English.

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