PRAXIS SCIENCE LAB / ANDROID

Praxis Scholar

Scientific calculations, fractions and statistics with familiar key workflows.

In testing Not yet available on Google Play.

An offline scientific calculator for study, with an original interface and a two-line expression and result display.

Use SHIFT functions, cursor editing, insert mode, replay, Ans and independent memory. Calculate with powers, roots, logarithms, trigonometric and hyperbolic functions, permutations and combinations.

Work with simple and mixed fractions, percentages, degree-minute-second values, engineering notation and rectangular/polar coordinate conversions. Choose degrees, radians or grads and fixed, scientific or automatic result formatting.

SD mode supports values and frequencies, editing and deletion, sums, mean, population standard deviation and sample standard deviation.

All features are free. Monetization is limited to a discreet banner in Guide, separate from the calculator keypad and display. There is no Pro tier, paid unlock or subscription. Version 0.1.0 is in testing and uses Google sample ads only.

Language

Romanian interface and offline guide. Standard mathematical function labels are retained.

Using the app

Android 9 or later. Independently implemented with original branding and graphics. Functional reference: fx-220 PLUS, second edition. Not a CASIO product or affiliate, and not certified as an identical firmware emulator. Numerical results are approximate; exhaustive last-digit parity with a physical calculator is not established.

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.