Scientific calculator plus 991

Contains adsIn-app purchases
4.9
463K reviews
10M+
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.
Updated on
Jul 11, 2024

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

4.9
449K reviews
Eric C
August 21, 2024
First, the graphics are great! Makes the phone look like an actual calculator. Next, functions are grouped perfectly--easy, quick access. No glitches/screen freeze, etc. Put together very well. Thank you! This is the correct way you get people to buy a product--create a great app, DON'T put a bunch of annoying ads in their face. Once they see how amazing it is they WANT to contribute a few dollars. I would have paid more for this calculator ($10) -- it's SO much better than the others.
364 people found this review helpful
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andy sugiyama
October 18, 2024
Very powerful app with terrible documentation. I paid for the full app but can't find easy things like a pi button or entering scientific notation. I can see results in scientific notation easily, but entering it is not obvious and the documentation is useless or non existent Those are MAJOR things to hide on a scientific calculator. I'm sure it must be there. But the help and documentation is so poor it makes the app useless. Potentially very powerful. Functionally quite wimpy.
8 people found this review helpful
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Sanjida sikander
November 24, 2024
The Scientific Calculator Plus 991 is a popular choice among students for complex calculations. Pros include its ability to perform a wide range of functions, including trigonometric, statistical, and logarithmic calculations, making it ideal for higher-level math and science courses. It is also typically solar-powered, which extends battery life. However, cons include its complex interface, which can be challenging for beginners,
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What's new

We appreciate all valuable feedback.
In this update, we added new features, fixed so some problems and improved the math engine.
Thanks for using our app.