CalcRef

CalcRef is an offline calculus reference and study app built for students who need formulas, practice, and quick math tools without opening a textbook or searching the web.

Study limits, derivatives, integrals, applications of derivatives, techniques of integration, applications of integrals, sequences and series, parametric curves, polar coordinates, and vectors. The app includes 136 calculus formulas across 8 topics, with clean notation, plain-language explanations, conditions, variable definitions, and worked examples.

Built-in calculators help you solve supported formulas step by step. Enter the known values, choose what to solve for, and review the result with the calculation steps. CalcRef is useful for homework, exam review, AP Calculus, college calculus, and quick checks while studying.

Reference tables give fast access to the essentials:
- Derivative rules
- Integral formulas
- Trigonometric identities
- Convergence tests
- Maclaurin series
- Unit circle values

Practice mode turns formulas into flashcards and quizzes. Choose one topic or review mixed calculus questions, flip cards to test recall, mark answers correct or missed, and track your progress by topic.

CalcRef also includes a unit converter with 16 categories, including length, area, volume, mass, force, pressure, temperature, energy, power, velocity, acceleration, density, viscosity, torque, flow rate, and angle. A math constants library includes pi, e, the golden ratio, Euler's constant, common trigonometric values, and more.

Designed for studying:
- Works offline after install
- No account required
- No ads
- Search formulas and constants
- Save favorites and bookmarks
- Create custom formulas
- Review calculation history
- Export and import your study data
- Use light mode, dark mode, or system theme

CalcRef Pro is optional and unlocks the full formula library, all reference tables, unlimited practice, custom formula creation, constants, and data export. Choose a weekly subscription, yearly subscription, or lifetime one-time purchase through Google Play.

All study content is bundled in the app. Your favorites, custom formulas, quiz progress, search history, settings, and calculation history stay on your device unless you choose to export or share them.