Scientific calculator plus 991

567K reviews
Content rating
Everyone
50M+
Downloads
Content rating
Everyone
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About this app

Scientific calculator 300 plus, 991 is the calculator for students and engineering student. Calculator 991 plus provides powerful functions in a real calculator 991 300 . It makes advanced calculator 991 become the most useful calculator for university and school.

Application includes some calculators inside:
- Basic calculator 300 plus
- Advanced calculator 115 plus
- Scientific calculator 991
- Scientific calculator 991 plus
- Graphing calculator 84 plus

Let's see some special features:

◉ Basic calculator 300 plus and 115 plus: supports from basic mathematics to advanced math functions: percentage, powers, roots, trigonometric, logarithms calculator. Fraction calculation 991 supports convert fraction to decimal, mixed fraction and solve fractions problems.

◉ Advanced calculator 115 plus: combines of hyper calculator and simple scientific calc. This calculator is a multi-functional advanced calculator 991 with all features in one app. Such as linear algebra, calculus, complex numbers, display result in rectangular and polar coordinates, matrix and vector.

◉ Scientific calculator 991 plus: includes smart equation solver. Equation solver can solve quadratic, cubic equations, systems of equations. Caluculator solves any polynomial. Smart scientific calculator 991 has exponent calculator contains scientific calculations such as derivative, integral, square root calculation, factorial calculation, pi calculation, equation solver.

◉ Scientific calculator 991: supports calculate with infinity number of digits, prime factors, random numbers, combinations, permutations, GCD and LCM. This calculator 991ex is a real engineering simulator. Scientific calculator has features of 500 es, 500 ms, 300 es plus, 991 es plus. Calculator keyboard layout same as calculator 300 es plus, 991 ex and es plus.

◉ Graphing calculator 84 plus supports function graph, polar, parametric and implicit function. Graphing calculator 84 can draw tangent, tracing, derivative, root, min and max. It simulates for graphing caluculator 83 and t1 84, 84 plus.

◉ Integral calculator 991 plus provide powerful calculator to calculate integrate, derivative, differentiation and integration.

◉ This scientific calculator 991 includes CAS (computer algebra system), which can perform symbolic calculation.

◉ Some other features: math formula, physics formula, unit conversion, theme, font and programming.
Advanced scientific calculator 991 plus. Includes simulator 115 and 300 plus.
Updated on
Nov 7, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity, App info and performance, and Device or other IDs
  • This app may collect these data types
    Personal info, Photos and videos and 3 others
  • Data isn’t encrypted
  • You can request that data be deleted

Ratings and reviews

548K reviews
Zach Jibben
May 22, 2022
Best scientific calculator on android, and I've tried them all. I wish this exact app was on iOS. No other calculator has the right combination of UI, one line per computation, being able to sroll back through calculations, and functionality. Premium is a one time purchase that's absolutely worth it. The only other app that comes close is HP Prime, if you need to bring out the big guns and can deal with a heavier, clunkier app.
469 people found this review helpful
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Matthew Gaming
September 11, 2020
It is incredible for students and can help you even after school I bought the pro version I think it was a incredible price would have paid more for it if I knew how good and helpful it would be. Have contacted them for support pretty helpful. I wish they made the tutorial more visible possibly if you opened the app for the first time it asks you if you want to see a tutorial. I wish you could take a photo of a math question and have it be imported instead of writing it all out. Overall happy.
53 people found this review helpful
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Aaron Samuel
August 28, 2020
Very useful and quite advanced calculator for a phone. I even find myself using it more than my physical calculator as funny as it seems. Mainly because it can solve a simultaneous equation with 3 uknows, solve cubics...etc stuff that you have to pay $60 for on a physical one. All in all not "SUPER RIDICULOUSLY FANTASTIC" but it surely gets the job done
11 people found this review helpful
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What’s new

We appreciate all your valuable feedback.
In this update, we added new features, fixed some issues, and improved the math engine.
Thank you for using our app.