What you can study in Merit Lab

The current library includes 15 original course practice packs, alongside the SAT study path and five earlier foundations packs. Foundations and expanded practice keep separate saved progress; both remain accessible.

• ACT — 202 original practice questions, 38 lessons.
• AP Calculus AB — 172 original practice questions, 24 lessons.
• AP Calculus BC — 221 original practice questions, 33 lessons.
• AP Computer Science A — 161 original practice questions, 33 lessons.
• AP Macroeconomics — 125 original practice questions, 26 lessons.
• AP Microeconomics — 122 original practice questions, 26 lessons.
• AP Physics 1: Algebra-Based — 152 original practice questions, 29 lessons.
• AP Precalculus — 101 original practice questions, 22 lessons.
• AP Psychology — 147 original practice questions, 35 lessons.
• AP Statistics — 168 original practice questions, 31 lessons.
• CLEP College Algebra — 113 original practice questions, 22 lessons.
• PSAT 10 — 151 original practice questions, 28 lessons.
• PSAT 8/9 — 139 original practice questions, 27 lessons.
• PSAT/NMSQT — 151 original practice questions, 28 lessons.
• SAT — 192 original practice questions, 30 lessons.

How to interpret your progress

Practice accuracy records objective answers. Written, graph and code self-review does not raise objective accuracy or mastery. Difficulty and timing estimates are provisional. There is no official score prediction, calibrated readiness certification or complete exam simulation.

Review and coverage

Questions and teaching examples have independent AI review with versioned evidence. Human academic approval and measured learner outcomes remain outstanding. A reviewed topic map and covered design tags do not establish comprehensive preparation.

Free study and optional purchase

All included questions, guides, quests, course selection and normal practice stay free. The Apple app offers a one-time Practice Toolkit for custom set controls in the included courses. Apple shows the applicable price. Restore ownership in Profile → Purchases. Future courses, cloud sync, web access and AI are not included in the purchase.

Your progress and privacy

Progress is local to your device or browser. Clearing storage can erase it. Profile provides progress export; SAT answer recovery has its own compatibility limits. There is no required account, cloud sync, student AI service or advertising. Optional anonymous usage sharing is off by default. Read the privacy policy.

Report a question

Tap the small report button on a question, choose a reason and optionally add a note. Nothing is sent until you submit. The app includes the question identifier and content version; a failed request does not claim success. Reports are kept for up to 90 days. Contact support if you need help.

Language and availability

The delivered interface and learning content are English. The Apple release is scoped to the United States. International planning and currency tables do not establish translated courses, worldwide rights or local payment availability.