Is UWorld worth it for SAT Math? UWorld is a question bank for the whole SAT, about 2,000 questions with written explanations, at roughly $99 a month. Sigma Prep is Math only, $49 a month, with 7,000+ Math problems, a video walkthrough on every one, and 24 full-length Math tests. If you need Reading and Writing practice in the same tool, UWorld. If Math is the section you are trying to move, Sigma Prep gives you more of it for less.
We build Sigma Prep. The UWorld numbers below come from their site and current reviews as of September 2026; their plans change, so verify before you buy.
Side by side, as of September 2026
| Sigma Prep | UWorld SAT | |
|---|---|---|
| Price | $49 per month, cancel anytime, 14-day money-back guarantee | About $99 for one month; lower per month on longer plans |
| Sections | Math only; Reading and Writing is in the works | Reading and Writing plus Math |
| Question volume | 7,000+ Math problems, by skill and difficulty | About 2,000 questions across both sections |
| Full-length tests | 24 adaptive Math tests, 8 official mirrors in 3 versions; first one free | Question bank with a Bluebook-style interface |
| Explanations | A video on every problem | Written explanations with illustrations |
| Desmos | Built in, and the video solutions use it | Built-in calculator in the test interface |
| After a miss | Practice set built from your misses | Performance tracking, flashcards, notebook |
| Free trial | Free diagnostic and one free full-length test, no card | Check their site for current trial terms |
Where UWorld wins
Both sections in one subscription, a polished Bluebook-style interface, and detailed written rationales, which some students prefer to video. If your Reading and Writing needs as much work as your Math, that matters.
Where Sigma Prep wins
Math depth and the price. Three and a half times the Math problems, full-length adaptive tests you can retake on fresh versions, and a tutor solving every problem on video the fast way, usually in Desmos. At $49 it costs about half as much for the section it covers.
What Sigma Prep does not do
Reading and Writing, for now. It is in the works and not available yet. Written rationales in the UWorld style; ours are videos. Official College Board questions; every problem is our own variation of an official type, so the originals in Bluebook stay clean for measurement.
Who should use which
- Both sections need work and you want one tool: UWorld, plus the free Bluebook tests.
- Math is the section holding your total down: Sigma Prep. Take a free test first and see whether the miss list is what you expected.
- Budget under $50 a month: Sigma Prep for Math, Khan Academy for Reading and Writing, both Bluebook and Khan free.
Try the free diagnostic, twelve real SAT Math questions, no card, or take the free full-length practice test with a free account.