A Full Graphing Calculator Built Into Your Notes
MathNotes includes a floating calculator panel with 11 modes -- everything from 2D graphing to eigenvalue computation -- accessible without leaving your notebook.
A draggable, resizable calculator
The calculator lives in a floating panel that you can drag anywhere on the screen and resize. It stays on top of your canvas so you can reference your notes while using it. When you do not need it, collapse it out of the way.
The scientific calculator tab is free. All other modes are available with a premium subscription, or you can unlock them temporarily by watching an ad (1 hour of access per ad).
2D and 3D graphing
The 2D graphing mode supports four equation types:
- -Standard functions: y = f(x), like x^2 or sin(x)
- -Parametric curves: x(t), y(t) with customizable parameter range
- -Polar curves: r(theta) for roses, spirals, cardioids, etc.
- -Implicit curves: F(x,y) = 0 for circles, ellipses, and other relations
You can plot multiple equations on the same graph with different colors, toggle their visibility, and zoom/pan interactively. The scientific calculator has a "send to graph" button so you can quickly plot an expression you just computed.
The 3D mode supports function surfaces z = f(x,y) and parametric surfaces, with interactive rotation and opacity controls.
Matrix calculator
The matrix mode provides a visual grid input for two matrices (A and B) with sizes from 2x2 to 4x4. Supported operations:
- -Addition, subtraction, and multiplication
- -Determinant, inverse, and transpose
- -Reduced row echelon form (RREF)
- -Eigenvalue computation (with complex number support)
If you use the Math Snip feature to select a handwritten matrix, it auto-populates the calculator with the values -- no manual entry needed.
All 11 calculator modes
Here is the full list of calculator tabs:
Scientific
Trig, logs, constants (free)
2D Graph
Function, parametric, polar, implicit
3D Graph
Surfaces and parametric 3D
Matrix
Operations up to 4x4, RREF, eigenvalues
Vector
Dot/cross product, magnitude, 2D/3D
Unit Circle
Interactive trig visualization
Symbolic Solver
Simplify, factor, solve, derive, integrate
Probability
Binomial, Poisson, normal, combinatorics
Number Theory
Primes, GCD, LCM, factorization
Truth Table
Logic operators, up to 3 variables
Unit Converter
10 categories: length, mass, temp, etc.
Why it matters
Having these tools inside your notes means you do not need to switch between a note app, a calculator app, a graphing app, and a CAS. You write a problem, compute it, graph it, and move on -- all in one window. The calculator remembers its state between sessions, so your graphs and matrices are still there when you come back.