Scientific calculator plus 991

Advanced scientific calculator 991 plus. Includes simulator 115 and 300 plus.

App info

Version :

7.2.3.694

Category :

Education

Update :

April 13, 2025

Installs :

42,758,700

Developer :

Tools for student

Requires Android :

Android 4.2+

Content Rating :

Everyone

Get it on :

Download APK

App description

Android App Analysis and Review: Scientific calculator plus 991, Developed by Tools for student. Listed in Education Category. Current Version Is 7.2.3.694, Updated On 13/04/2025 . According to users reviews on Google Play: Scientific calculator plus 991. Achieved Over 43 million Installs. Scientific calculator plus 991 Currently Has 485 thousand Reviews, Average Rating 4.9 Stars

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.

We are currently offering version 7.2.3.694. This is our latest, most optimized version. It is suitable for many different devices. Free download directly apk from the Google Play Store or other versions we're hosting. Moreover, you can download without registration and no login required.

We have more than 2000+ available devices for Samsung, Xiaomi, Huawei, Oppo, Vivo, Motorola, LG, Google, OnePlus, Sony, Tablet ... with so many options, it’s easy for you to choose games or software that fit your device.

It can come in handy if there are any country restrictions or any restrictions from the side of your device on the Google App Store.

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.

Rate and review on Google Play store

4.9

485,189 total

5 91.5

4 6.1

3 0.7

2 0.4

1 1.3

Total number of ratings

Total number of active users rated for: Scientific calculator plus 991

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

Surya Hitam

The app (Pro version) is excellent and well worth the modest price. I have stopped using my actual hardware calculator and use this app just about every day in my work as an engineer. Thanks for the clarification about the consent form not being applicable to pro-version purchasers. [EDIT] This app continues to delight with its cornucopia of features. I've just discovered that you can write your own functions, a really useful feature (Shift 6 to get started, don't know why I had missed it).

Jack C

Very good calculator. I'm a 3rd year in electrical engineering, and it has been my goto general calculator. I used to have a complaint about the graphing, but they've made it significantly better since that review. Other significant features are its calculus, vector, and complex number abilities. All work very well and are some of the easiest to use that I've ever come across. Would highly recommend.

Michael Castro

App is very easy to use. Interface gives you the feeling of a real calculator. Easy learning curve for new users. It contains ads but it does not hinder the experience. The upgraded version with no ads and more features cost $1.80. So if you use a calculator regularly, I would recommend getting the PRO version.

Jeffery Mccoy

I had used a scientific calculator when I was in the Naval Nuclear Power program back in the late 80s and quite a bit when I went back to college for my electrical engineering curriculum. This calculator is laid out similarly,at least programmable,like the Hewlett Packard programmable calculators that some of my friends had in the Navy. I really like the functionality of this calculator/computer!

Sumbul Ansari

Easy to use. Many many functions ( still haven't got to use every one of these). A great Calculator for any type of calculation. Ads are minimal (hope that doesn't change).

Hoang Nguyen Minh

This app is incredibly helpful. Has all the functions of an expensive Scientific calculator plus the ability for graphs and easy access to Math/Phys/Chem formulas even with only the free version. Deserved 5 stars!

Chong Zi Him

This is an amazing app for people who can't buy a real scientific calculator. it has pretty much all features of a normal scientific calculator and some extra features, but I just wish it was allowed in my school (this is not the apps fault) In conclusion the scientific calculator app needs anything you need!

Nana Akosua Caliel

It really helps in making my solvings so easier and faster. It is really helping me than I thought it was going to be. Sometimes I even thinks it's a calculator that I'm holding forgetting it's an app on my phone that I'm holding