Scientific calculator plus 991

566K reviews
Content rating
PEGI 3
50M+
Downloads
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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
Oct 22, 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

547K reviews
Solayman Bhuiyan
August 3, 2026
The best calculator, would be an understatement. It is the holy grail of calculators, plus a small fee for lifetime premium is mind boggling because it's much better than those casio subscription based emulators on laptops and those gimmic feature based 'calculator' apps on android. (sometimes, I forget I am not using my physical calculator and actually prefer this over my physical calculator).
8 people found this review helpful
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SAMATICA EDUCATION TECHNOLOGY COMPANY LIMITED
August 10, 2026
Thank you so much for using our app and taking the time to share your thoughts! We are thrilled to hear that you had such a wonderful experience. Please keep using the app, and feel free to share it with your friends if you find it helpful!
abc def
May 21, 2024
Cannot overstate how useful and brilliant this calculator has been for me, I'm considering buying premium just to support their good work (and also to get rid of the ad bar, which is at times less appropriate than what's expected in the classroom). One gripe is the bias towards ln rather than base 10 logs in solutions, would like an option to fix that.
83 people found this review helpful
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Eli Daw
June 2, 2021
(pls read all) My friend is a physics professor and I challenged him to find a calculation that this calculator couldn't do. After him asking me to convert from yocto watts and finding root -1, both of which it did with no problem he agreed to concede. The only thing we could find after looking for 15 minutes was "i" factorial. Seriously though, this calculator can do everything, unit conversions, standard to complex calculations and drawing graphs. Adds are infrequent and it's well laid out.
57 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.