T991 Scientific Calculator

Jack Yu(于)

Google Play★ 3.5FreeFirst seen 13 Oct 2026

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App info

Installs: 10,000+
Category: Tools
Content rating: Everyone
Version: 1.24
Released: Jun 13, 2024
Last updated: 15 Oct 2026
In-app purchases: No
Contains ads: No
Promo video: No
Requires Android: 8.0

3.567 ratings

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What's newin version 1.24

fix bug

About this app

CASIO calculator fx-991es emulator

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T991 Scientific Calculator is the calculator for students and engineering student. Emulates CASIO fx-991es physical calculator. Features: 1.percentage, powers, roots, trigonometric, logarithms calculator. 2.linear algebra, calculus, complex numbers, display result in rectangular and polar coordinates, matrix and vector. 3.equation solver can solve quadratic, cubic equations, systems of equations. 4.support undo, history, copy/paste Random integers Fraction calculations Combination and permutation Statistics (List-based STAT data editor, standard deviation, regression analysis) 9 variables Table function Equation calculations Integration/differential calculations Matrix calculations Vector calculations Complex number calculations CALC function SOLVE function Base-n calculation

Developer website gfso2000@gmail.com