Calc89
Graphing Calculator with CAS
$0.99 · Designed for iPad. Not verified for macOS.
Exact algebra, calculus and graphing with the classic 89-style keyboard. Solve, factor, integrate and graph in 2D and 3D, exactly the way you learned it.
Calc89 is a full computer-algebra graphing calculator built around the classic 89-style keyboard. Every key, shift label and menu sits where you expect it, so the keystrokes you already know just work, now on a crisp, modern display for iPhone and iPad that follows Light and Dark Mode.
EXACT ANSWERS
• Fractions, radicals and π stay exact: √12 = 2√3, sin(π/12) = (√6−√2)/4
• Complex numbers in rectangular or polar form
• Huge integers, exact factorials and prime factoring
• Units and conversions for every common quantity, with physical constants
• Decimal, hexadecimal and binary, with bitwise operations
ALGEBRA
• solve, factor, expand, zeros, cSolve, nSolve, propFrac, comDenom
• Equations with radicals, logarithms, absolute values and trig, with general solutions
• Inequalities, and systems of equations and inequalities
• Rewrite expressions in terms of ln, exponentials, sin or cos
CALCULUS
• Derivatives of any order, including implicit
• A powerful integrator: rational functions of any degree it can solve exactly, trig, exponential and logarithmic integrands, letter constants, and definite integrals that always return a value
• Limits (one- and two-sided), sums and products, Taylor polynomials
• fMin, fMax, arc length and differential equations with initial conditions
GRAPHING
• Function, parametric, polar, sequence, 3D and differential-equation modes
• Trace, every zoom, and Math tools: zeros, extrema, intersections, derivatives, integrals with shading, tangents, arc length and distance
• 3D surfaces you can rotate, with contours and wire frames
• Slope and direction fields, and cobweb plots for sequences
• Draw lines, circles, text and freehand, shade between curves, and save pictures and graph setups
• Drag to pan and pinch to zoom
• Tables with automatic or typed values
• Split screen: two apps at once, or two independent graphs
MATRICES, DATA AND STATISTICS
• Exact determinants, inverses, rref, eigenvalues, LU and QR, and vector tools
• Data/Matrix editor with column formulas
• One- and two-variable statistics and ten regressions
• Scatter, line, histogram and box plots, with frequency and category lists
PROGRAMMING
• Write and run programs and functions in the classic calculator BASIC
• Program editor with control, input/output and variable menus
• Dialogs, pop-up menus, custom toolbars and graphics commands
• A text editor for notes and scripts, and a numeric solver for any equation
• Folders, locking and archiving to keep your work organised
Your history, variables, programs and settings are saved automatically.
No accounts, no ads, no tracking, and no internet needed. Everything stays on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Joshua Wood, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joshua Wood
- Size
- 6.8 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 JWE Software
