Features

1,000+ high-frequency SAT words. Every card asks you to pick the correct meaning before the answer shows — active recall built into every session.

• 1,000+ words across 5 tiered batches
• Spaced repetition that schedules reviews automatically
• Wrong picks come back — same session, before you finish
• Quiz mode — typed recall, just like the real SAT
• Hint feature — cloze sentences reveal context
• Flag difficult words for targeted review
• Timed practice test — 8 questions, Digital SAT format
• Progress tracking — streak, accuracy, mastered count

Writing and grammar practice for the Digital SAT's Reading & Writing section.

• 15 core rules — subject-verb, pronouns, modifiers, parallelism, commas, and more
• 77 practice questions in official SAT format
• Inline explanation for every question
• Per-rule progress tracking
• Session history and accuracy breakdowns

All four SAT math domains with 12 Desmos-powered strategies that cut problem-solving time in half.

• 256 questions across algebra, advanced math, data analysis, and geometry
• 12 Desmos strategies — intersection method, regression, sliders, plug-in, and more
• Time-saved estimate on every strategy (15–90 seconds per question)
• Multiple-choice + student-produced response (SPR) formats
• Dual-verified answers — every question machine-checked
• Structured "Without Desmos / With Desmos" step-by-step explanations
• Filter practice by domain or by strategy

Reading comprehension strategies built on classic literature and contemporary passages.

• 8 reading strategies — locate evidence, paraphrase, eliminate extremes, author’s purpose, and more
• 64 questions across all 8 strategies
• 28 passages spanning literature, history, natural science, and humanities
• Public-domain passages from Austen, Dickens, Melville, Emerson, Thoreau, Lincoln, and Douglass
• Structured "Without the strategy / With the strategy" explanations
• Mixed reading levels with a cap on advanced passages

See where your student stands and what to practice next — all in one place.

• Predicted SAT score — live projection out of 1600 with a confidence band
• Adaptive placement test — finds each student’s starting level
• Consecutive-day streak and 14-day practice calendar
• Recent activity across Vocab, Grammar, Math, and Reading
• Mistakes review — re-attempt every missed question with one tap
• Test-date countdown — set your SAT date and see days remaining

• Manage multiple children from one account
• See each child’s predicted score, streak, and session history
• Review missed questions with detailed error breakdowns
• Per-student upgrade — pay only for the kids who need more
• Referral credits — share PrimePrep with other families

• Secure sign-in with a personal student code — no passwords to remember or lose
• Install to home screen — works like an app on any phone
• Works offline once installed
• 10-minute sessions — short enough to stick, long enough to learn

• SAT Vocabulary is free forever — no credit card needed
• Full Access unlocks Grammar, Math, and Reading for $99 per student per year — one-time, not a subscription
• Family plans cover multiple children at $99 per student
• 7-day free trial on Full Access

Mastery-based math progression from counting through calculus — for ages 3–18.

No credit card required.