Numeris 3D Graphing Calculator

Qorvano°

In-app purchases

About this app

Numeris is a calculator, scientific calculator, and graphing calculator in one app — featuring 3D surface plots and symbolic derivatives up to the 5th order.

Three modes, one thoughtful design. Built for anyone who wants a calculator that's as precise and elegant as the math itself.

◆ BASIC
Full expression editor showing the complete formula as you type. Copy/paste, bracket highlighting, clear error messages. Every calculation is saved to a filterable history with dates.

◆ SCIENTIFIC
Trigonometry (sin, cos, tan and inverses), hyperbolic functions, logarithms (ln, log, log2, arbitrary bases), roots, powers, exponents, constants (π, e). RAD/DEG toggle for angle mode. All functions on one clean keyboard, including a second-function toggle for extended operations.

◆ 2D GRAPHING
Enter y = f(x) and watch it plot live. Multiple curves at once in 20 consistent colors. LaTeX preview as you type (proper mathematics rendering). Auto-fit zoom intelligently detects zeros, extrema, and periodicity to choose the ideal viewport. Tap a curve to highlight it.

◆ 3D GRAPHING
Surface plots z = f(x, y) with full 3D interaction: one-finger drag rotates, two-finger drag pans, pinch zooms. Height-gradient coloring reveals function structure at a glance. Wireframe rendering for clean contours.

◆ DERIVATIVES
True symbolic differentiation — not a numerical trick, but genuine expression transformation. See f'(x), f''(x) up to the 5th order as algebraic expressions, not numerical approximations. Perfect for students and teachers who want to understand the math, not just the answer.

◆ DESIGN
"Precision & Luminescence" — OLED-black, no unnecessary lines, cyan and orange accents. Glassmorphism for depth, carefully selected typography, responsive on iPhone and iPad — with an optimized landscape layout on iPad.

◆ PRIVACY
Numeris collects NOTHING. No accounts, no tracking, no analytics, no ads. All calculations and your history stay exclusively on your device. Fully offline-capable. Available in 20 languages.

◆ PRICE
Free. Basic and Scientific are fully unrestricted. Graphing mode offers 5 free plots to try. After that, a one-time in-app purchase (lifetime) unlocks unlimited plotting. No subscriptions, no hidden costs.

Questions? [e-mail]

What’s new

This update fixes calculation bugs and improves accuracy:

• Inverse trig functions (arctan, arcsin, arccos) now return correct values in degree mode.
• Correct precedence for signs and exponents (e.g. −2² and 2x²).
• Large factorials are now computed exactly.
• The Pro unlock now applies immediately (lock icon).

These fixes also apply to 2D/3D function graphs and derivatives.