Scientific Calculator Plus 991

Name: Scientific Calculator Plus 991
Rating: 4.7 (12107 reviews)
Author: Tran Duy

By: Tran Duy

NCalc & CalcES Calculator 115

Features & Capabilities

Scientific Calculator Plus 991 delivers NCalc and CalcES capabilities in a natural-display scientific calculator with graphing, a comprehensive formula library, and a unit/currency converter. It fuses algebra, calculus, complex numbers, and equation solving with a full graphing module (83/84-style) to help students and engineers work faster and more accurately.

Key features include exact fractions and decimals, multiple angle units, matrix operations, statistics and distributions, base-N arithmetic, tables, variables, user-defined functions, built-in constants, and a broad math-physics formula catalog. With history, copy/paste, and flexible output formats, it’s designed for learning, quick reference, and reliable problem solving.

User Growth & Download Statistics

App Education Programming Data

By:

Tran Duy

Rating:

4.70

(12,107) 48 new ratings

Version:

3.5.8 Last updated: 2026-05-05

Version code:

884920011

Creation date:

2019-04-03

Compatible devices:

Size:

152.04MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 15,903 ▼ 72

Other rankings

#14 in calculator keyword 37 ▲ 1

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Tran Duy

Apple Apps Store

https://apps.apple.com/us/app/scientific-calculator-plus-991/id1449106995

Website:

https://ncalc-app.web.app

User Reviews

Users praise its deep feature set and reliability, making it a top choice for math, engineering, and everyday use. While the app is highly capable and easy to use, several reviews cite performance issues such as input lag and occasional freezes. Overall, it's seen as a powerful, versatile calculator across Mac, iPad, and iPhone.

Pros

Feature-rich and versatile: CAS, constants, built-in formulas, tutorials, and units conversion.
Highly reliable and well-regarded, with long-term satisfaction and frequent praise as one of the best calculators.
User-friendly design: large font, clear input, and a non-intrusive buying prompt.
Cross-device availability: performs well on Mac, iPad, and iPhone with a consistent experience.

Cons

Performance issues: noticeable lag in basic calculations and occasional typing freezes.

Recent reviews

The calc i needed

by jd*****, 2026-05-28

this calculator is the best!

by Ja*****, 2026-05-01

This Calc literallly has everything! It works great for all my EE stuff. (It even has CAS) The only small thing I would ask to add is the abillity to change the app icon on the Mac version like you can on the Ipad version. Outstanding app!