Scientific Calculator Plus 991
Scientific Calculator Plus 991 Summary
Scientific Calculator Plus 991 is a free, with in-app purchases iOS app in Education by Tran Duy. Released in Apr 2019 (7 years ago). It has 159.3K ratings with a 4.73★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 181.8K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store last updated Jun 25, 2026
Recent activity: 16 new ratings this week View trends →
SDK intelligence: AppGoblin detected 6 development tools(e.g. OpenID), 5 ad networks,and 1 analytics: product integrated into Scientific Calculator Plus 991. View full SDK list →
Scientific Calculator Plus 991 SDKs Summary
Scientific Calculator Plus 991 was last scanned for SDKs on 2026-07-10. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
Vungle
AppLovin
InMobi
Mintegral
OpenID
Google
Alamofire
SDWebImage
Firebase4.73★
Ratings: 159.3K
Screenshots
App Description
NCalc — Powerful Scientific Calculator, Graphing, and Converter
NCalc combines a natural-display scientific calculator, advanced math tools, a full graphing module (as 83/84 calculator), a large formula library, and a comprehensive unit and currency converter—designed for students, engineers, and anyone who loves math.
◉ Main Calculator Features
- Natural display: Enter expressions exactly as in textbooks—fractions, roots, exponents, and more—see results as written on paper.
- Keyboard layout: Matches popular models for familiarity and speed: 115 ES Plus, 991 ES Plus, 300 ES Plus, and 991 EX.
- Symbolic and numeric modes: Perform exact fraction calculation or evaluate numerically when needed.
- Arbitrary precision integers: Work with very large integers without losing accuracy.
- Output types: Choose from fraction, mixed fraction, decimal, repeating decimal, degrees/minutes/seconds, and polar coordinates.
- Angle units: Degree, radian, and gradian (grade).
- Decimal formatter: Display numbers in normal, engineering, engineering SI, scientific, or fixed formats.
- Calculation history: Review and reuse past calculations with ease.
- Copy and paste support for fast data entry and sharing.
◉ Algebra, Calculus, and Core Math
- Algebra calculation: Expansion, factorization, simplification, and more.
- Calculus calculator: Derivatives, integrals, and limits of expressions.
- Complex number calculation: Arithmetic, polar/rectangular conversion, exponential, logarithm, powers, roots, and full trigonometric functions.
◉ Equations and Inequalities
- Equation solver: Solve general equations, plus dedicated solvers for quadratic, cubic, and quartic equations.
- System of equations solver: Solve systems with 2, 3, or 4 variables.
- Inequality solvers: Quadratic, cubic, and quartic inequalities with interval-based solutions.
◉ Matrices and Vectors
- Operations: Addition, subtraction, multiplication for matrices and vectors.
- Advanced tools: Determinant, inverse, transpose, rank, eigenvalues, and eigenvectors.
◉ Statistics and Distributions
- Statistical calculation: Descriptive stats and regression calculation (including a regression plotter).
- Distribution calculation: Normal distribution, binomial distribution, Poisson distribution, t-distribution, chi-square distribution, and F-distribution.
◉ Number Bases and Formats
- Base N calculation: E