Every curve starts
with one step.
1,100+ practice questions, a tutorial for every chapter, and a predicted exam score that gets more accurate the more you study.
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Built like a real study plan, not a quiz app.
A tutorial for every chapter
Clear explanations and worked examples for all 10 units, from limits through series. Chapter 1 is free to read, no account needed.
Practice, your way
Pick any chapter, or mix questions from all of them. Each round is 10 questions with instant feedback and a full worked solution.
Scored chapter quizzes
15-question quizzes for every chapter, pulling from the full question pool — a real check on what's actually sticking.
A real predicted AP score
A 30-question practice exam, sampled evenly across every chapter, ends with a predicted score (1–5) and a likely range — not just a raw percentage.
Confidence that builds over time
Every chapter gets its own confidence score that updates with every question you answer — across practice, quizzes, and exams, not just one sitting.
A clear goal to work toward
Track how much of the full 1,100-question bank you've completed, paced against your actual exam date.
Three ways to study, one place to see it all come together.
Learn
Read a chapter's tutorial at your own pace, whenever you're ready for it.
Practice
Work through questions with instant feedback, or take a scored quiz to check your standing.
Know where you stand
Take the full practice exam whenever you want a real read on your predicted score — and watch your chapter confidence grow as you go.
Start free. Upgrade when you're ready.
Try it first
Chapter 1's full tutorial and 5 sample practice questions are free, no account or payment required.
CalcPass+ is an auto-renewing subscription, billed through your Apple ID. Subscription automatically renews at the selected price unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings → [your name] → Subscriptions.
Good to know
Do I need to make an account?
No. CalcPass doesn't use email or password sign-in — your progress is tied to the app itself, right from your first launch.
What's actually free?
Chapter 1's tutorial and 5 sample practice questions, no payment or subscription required.
How is the predicted AP score calculated?
It's based on item response theory — the same general approach used across the test-prep industry — weighing which questions you got right, not just how many. Missing an easy question counts differently than missing a hard one.
Is this for AB, BC, or both?
Both. The question bank and tutorials cover material relevant to AP Calculus AB and BC.
Can I cancel anytime?
Yes, anytime, directly through your Apple ID subscription settings — CalcPass+ auto-renews until you do.
Does my progress survive if I get a new phone or reinstall?
Yes — your tutorial progress, practice history, chapter confidence, and exam date are all saved to the cloud automatically, tied to your device install, not a traditional account.