PRAXIS SCIENCE LAB / ANDROID

Praxis Graph

Offline graphs, equations, matrices and numerical calculus.

In testing Not yet available on Google Play.

An offline scientific and engineering calculator for exploring mathematics on Android.

Use the free calculator for algebraic or RPN input, number bases, constants, unit conversions, memory and local history.

The Pro toolkit plots two functions with pan, zoom and point inspection. Find approximate roots, intersections and extrema; solve scalar equations and nonlinear systems with up to three unknowns.

Work with matrices up to 8 by 8, vectors and complex expressions. Explore descriptive statistics, linear regression, numerical derivatives and adaptive numerical integration.

No advertisements or subscription. The basic calculator is free; Pro is designed as a permanent, one-time unlock. Version 0.1.0 is in testing, and commercial purchasing is not available yet.

Language

English and Romanian. Detailed mathematical-engine messages may appear in English.

Using the app

Numerical methods return approximations and may fail to converge. Plot sampling can miss discontinuities or rapidly varying behavior. Integration does not support improper integrals. Android 8 or later; portrait interface.

Praxis Science Lab is the publishing brand used by Traian Anghel. For support or privacy questions, email traiananghel@gmail.com. Include the app name and version. Do not send passwords, medical records, private recordings or other sensitive information.