CalcRef is the complete calculus formulas app for students: 100+ formulas across 8 topics, 6 reference tables, and flashcard quizzes — built for AP Calculus, college exams, and everyday review.
Real screens from the app: a formula with its worked examples, the derivative rule reference, and a flashcard turned over.
Calculus lives or dies on recall: the right rule, its conditions, and what each variable means. Scattered study materials make that harder than it needs to be.
From the first limit to polar curves, CalcRef's formula library follows the order you learn it — through AP Calculus AB/BC and the college Calc I–III sequence.
Everything below comes straight from the app — no fluff, no accounts, no connection required.
Each formula is LaTeX-rendered with a plain-language description, its conditions for use, and definitions for every variable. Computational formulas include a built-in calculator with step-by-step solutions.
Read: derivative rules explained →Derivative Rules, Integral Formulas, Trigonometric Identities, Convergence Tests, Maclaurin Series with convergence intervals, and the full Unit Circle in degrees and radians.
Read: choosing a convergence test →Rounds of 10 cards from one topic or a mix of all eight. Flip, mark correct or missed, review your score — and watch per-topic stats and quiz history improve over time.
Read: how to memorize formulas →Length, area, volume, mass, force, pressure, temperature, energy, power, velocity, acceleration, density, viscosity, torque, flow rate, and angle — reachable from any screen.
A database of precise values for pi, e, the golden ratio, and more — searchable alongside the formulas.
Bookmark formulas to Favorites, search as you type, keep a calculation history, create custom formulas, pick dark or light theme, and set decimal precision or scientific notation.
Read: AP calculus formula review →CalcRef is a reference and practice tool — here is what that looks like in real study situations.
The AP exam gives you no formula sheet, so recall is the whole game. Drill one topic at a time with 10-card quiz rounds, then check per-topic stats to see which of the eight topics still needs work before test day.
Convergence tests, Maclaurin expansions, integration techniques — the six reference tables put the exact statements and their conditions one search away, even in a basement library with no signal.
Look up a formula with its variable definitions instead of guessing, run computational formulas through the built-in calculator with step-by-step solutions, and bookmark the ones your course leans on.
Straight answers, taken directly from what the app actually does.
Yes. CalcRef is listed as a free download on both the App Store and Google Play.
Yes. CalcRef is built as an offline app — every formula, table, and practice tool is available without an internet connection.
Over 100 formulas across 8 topics: Limits and Continuity, Derivatives, Applications of Derivatives, Integrals, Techniques of Integration, Applications of Integrals, Sequences and Series, and Parametric, Polar, and Vectors.
Every formula includes LaTeX-rendered notation, a plain-language description, conditions for use, and variable definitions. Computational formulas also include a built-in calculator with step-by-step solutions.
You can test yourself with flashcard-style quizzes — 10 cards per round from a chosen topic or a mix of all topics. Mark each card correct or missed, review your score, and track progress with per-topic stats and quiz history.
Yes. You can create and save your own custom formulas, and bookmark any formula to Favorites for quick access. Search finds any formula or constant as you type.
CalcRef is a universal iOS app for iPhone and iPad requiring iOS 15.1 or later, and it is also available for Android on Google Play.
Free, offline, and organized the way your course is. Download CalcRef and stop losing points to a forgotten condition.
CalcRef