Scientific Calculator Plus 991 vs Maple Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scientific Calculator Plus 991
This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.
- Natural display input
- Graphing module
- Formula library
- Unit and currency converter
- Algebra and calculus tools
- Matrix and vector operations
- Statistical calculations
Read full descriptionHide full 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: Effortlessly switch between binary, octal, decimal, and hexadecimal, with arithmetic in each base. ◉ Tables, Variables, and Custom Functions - Table Generator: Generate value tables based on any expression and range. - Calculator variables: Store values and reuse them across calculations. - User-defined functions: Create your own functions to streamline repetitive work. - Built-in constants: A rich set of mathematical and physical constants. ◉ Formulas - Extensive formula collection: Math and Physics formulas, clearly categorized—ideal for secondary school, high school, and university students. ◉ Unit Converter - Currency Converter - 1000+ unit conversions ◉ Graphing as 83, 84 calculator - Cartesian functions, implicit plots, polar, and parametric. - Tracing, roots, intersections, extrema, derivative, and integral evaluations on graphs. ◉ Auto-renewing subscription You may purchase an auto-renewing subscription through an In-App Purchase. • Auto-renewable subscription • Your subscription will be charged to your AppStore account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your AppStore Account Settings after purchase • Privacy policy and terms of use: https://ncalc-app.web.app/terms-of-services.html
Maple Calculator
This app provides comprehensive math homework assistance, offering step-by-step solutions for a wide range of high school and university level problems. It functions as a graphing, scientific, algebra, calculus, and integration calculator, with the ability to visualize equations in 2-D and 3-D.
- Step-by-step math solutions
- Camera and handwriting input
- 2D and 3D graphing
- Scientific and algebra calculator
- Calculus and integration solver
- Built-in math game
Read full descriptionHide full description
Powered by Maple, the most powerful math engine in the world, this all-in-one calculator solves math problems, generates 2-D and 3-D visualizations, and provides step-by-step solutions for a wide variety of math homework problems encountered at high school and university. [STEP BY STEP MATH SOLUTIONS FOR HOMEWORK] This app is a graphing calculator, scientific calculator, algebra calculator, calculus calculator, and integration calculator combined all into one! Take a picture of your problem using your phone's camera or enter it via the app's built-in math editor to see the final answer or get step-by-step solutions. [QUICK AND POWERFUL MATH SOLVER] No matter how you enter your problem, you can find derivatives and integrals, factor polynomials, invert matrices, solve systems of equations, solve ODEs, and much more. Our calculator has the power of the world-leading Maple math engine behind it, so it can do a LOT of math! [GRAPH PROBLEMS AND RESULTS] See 2-D and 3-D graphs of your expressions instantly, and watch how the graph changes as you change the expression. On this calculator you can zoom in, pan, and even rotate 3-D plots to get a closer look at areas of interest. [PLAY A BUILT-IN FUN MATH GAME] Play our calculator’s built in game, Sumzle, which is like Wordle but for math and equations. FEATURES: • Enter Math Problems Using Your Camera Or By Drawing them with the Handwriting Palette Or By Entering Directly with the Built-in Math Keyboard • Do All Sorts Of Math Operations And Get Step By Step Solutions • Get Answers Even When You Are Offline • Take Quality Math Notes Through Maple Learn. Use The Calculator Camera To Automatically Send Your Handwritten Steps To Maple Learn Where You Can Uncover Mistakes And Share Your Work With Others. • You Can Upload Mathematical Expressions From Our Calculator To Maple Desktop • International Language Support (English, Spanish, French, German, Russian, Danish, Swedish, Japanese, Hindi, And Simplified Chinese) MATH CAPABILITIES ON OUR CALCULATOR: • Basic Math: Arithmetic, Fractions, Decimals, Integers, Factors, Square Roots, Powers • Algebra: Solving And Graphing Linear Equations, Solving And Graphing Systems Of Equations, Working With Polynomials, Quadratic Equations, And Functions, Logarithmic And Exponential Functions, Trigonometric Functions, Trigonometric Identities • Precalculus: Graphing, Piecewise Functions, Absolute Value, Inequalities, Implicit Functions • Linear Algebra: Finding The Determinant, Inverse, Transpose, Eigenvalues, And Eigenvectors, Solving Matrices (Reduced Echelon Form & Gaussian Elimination) • Differential Equations: Solving Ordinary Differential Equations • And more
Screenshots
Verdict
The clearest difference is ads: Maple Calculator at none against Scientific Calculator Plus 991's shown. Scientific Calculator Plus 991's advantage is review sentiment (92% vs 62%) and update cadence (every 2 weeks vs every 2 months). On price, rating, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Scientific Calculator Plus 991 sells 4 in-app purchases, starting at $1.99 per month and Maple Calculator sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Scientific Calculator Plus 991 against 4.7 for Maple Calculator. That said, the two scores are not equally well evidenced: Scientific Calculator Plus 991 has 12K ratings behind it against 1.5K, so its average is the more settled of the two. Written reviews are what separate them: 92% of Scientific Calculator Plus 991's written reviews are positive against 62% of Maple Calculator's.
Scientific Calculator Plus 991 ships an update every 2 weeks, Maple Calculator every 2 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.
| Parameter | Scientific Calculator Plus 991 | Maple Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (12K ratings) | 4.7 (1.5K ratings) |
| Positive reviews | 91.8% of reviews — better | 62.1% of reviews |
| Number of ratings | 12K — better | 1.5K |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15 — better | 15.6 |
| Further details — not scored | ||
| Size | 176 MB | 69 MB |
| Age rating | 12+ | 4+ |
| Developer | Tran Duy | Maplesoft |
Customer experience
Scientific Calculator Plus 991
Maple Calculator
User reviews
Scientific Calculator Plus 991
From 12K App Store ratingsWhat we love
- 👍 Intuitive and easy to use
- 🚀 Powerful and feature-rich
- 💡 Customizable interface and settings
- 🔍 Extensive library of formulas and equations
- ⚙️ Handles complex math and scientific functions well
Room to improve
- 🐛 Occasional bugs and input issues
- 🔀 Confusing layout and button placement
- 💰 Some advanced features locked behind paywall
Maple Calculator
From 1.5K App Store ratingsWhat we love
- 👍 Excellent tool
- 👍 Does what it's supposed to do perfectly
- 👍 Very useful and fun to use
- 👍 Works great
- 👍 The best math app in the world
Room to improve
- 🚫 The idea of using the system keyboard instead of the app's keyboard is very bad and makes the app difficult to use
- 🐛 When trying to take a photo in the app the camera quality appears to blurry, and a picture cannot be taken
- 🐛 This app is honestly bad. It gets questions wrong and doesn't answer them correctly at all
- 🚫 No support, no instructions, nobody cares
- 🚫 Entering an equation by typing has been a frustrating experience, if not impossible
Bugs and requests
Scientific Calculator Plus 991
Reported bugs
3 issues- Keyboard input stops working after switching screens
- Incorrect calculation results for certain operations
- App crashes on some devices after recent update
Requested features
5 requests- Add option to change display font and color
- Improve cursor control and editing capabilities
- Implement auto-simplification for complex expressions
- Add more handwriting font options
- Expand graphing and equation solving features
Maple Calculator
Reported bugs
5 issues- When trying to take a photo in the app the camera quality appears to blurry, and a picture cannot be taken
- This app is honestly bad. It gets questions wrong and doesn't answer them correctly at all
- Entering an equation by typing has been a frustrating experience, if not impossible
- Ne se met pas en mode paysage
- Does not work for iPad, why does this not work for iPad ?
Requested features
4 requests- More options
- Zoom for graphs in double direction separately
- Support for landscape mode
- Fundamental physical constants, or the ability to assign letters to constants
In-app purchases
Scientific Calculator Plus 991
- Calculator month subscription$1.991 Month
- Calculator yearly subscription$3.991 Year
- Calculator Premium$5.99
- Calculator Pro$5.99
Maple Calculator
- 1 month$6.991 Month
- 6 months$25.996 Months
- 12 months$29.991 Year
Questions
Is Scientific Calculator Plus 991 free?
Is Maple Calculator free?
Which has better reviews, Scientific Calculator Plus 991 or Maple Calculator?
Do Scientific Calculator Plus 991 or Maple Calculator have ads?
Which is updated more often, Scientific Calculator Plus 991 or Maple Calculator?
Other comparisons















