# Scientific Calculator 991CW — Equation, Matrix & Math Solver

> Equation, Matrix & Math Solver (iPhone/iPad app by Murad Yaghi.)

- Source: https://appshunter.io/ios/app/scientific-calculator-991cw/id6777380822 (this page in markdown: same URL + `.md`)
- Developer: [Murad Yaghi](https://appshunter.io/developer/1740110475)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English
- Released: 2026-06-11
- Data updated: 2026-10-24

## What is Scientific Calculator 991CW?

Scientific Calculator 991CW is a natural-display scientific calculator designed for students, engineers, and technical work. Calculate and Complex modes are free. Pro unlocks eleven advanced modes:

• Statistics
• Distribution
• Spreadsheet
• Table
• Equation
• Inequality
• Base-N
• Matrix
• Vector
• Ratio
• Math Box

Calculate with fractions, roots, trigonometry, logarithms, calculus, constants, unit conversions, complex numbers, matrices, vectors, statistics, probability distributions, spreadsheets, function tables, equations, inequalities, ratios, and dice and coin simulations. Choose natural or linear input, convert exact results to decimals, and use calculation history and replay without creating an account.

Calculations, settings, history, and the locally generated calculator identifier are stored on your device. The app has no ads, tracking, analytics SDKs, accounts, or backend data collection.

Pro is available as a monthly or yearly auto-renewing subscription, or as a one-time Lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in your Apple Account settings. Restore Purchases is available for devices using the same Apple Account.

This independent app is not affiliated with or endorsed by any calculator manufacturer.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://matinformatics.org/privacy/scientific-calculator-fx-991cw

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly Pro | $4.99 | per year |
| Monthly Pro | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $7.99 | one-time |


## Is Scientific Calculator 991CW safe?

Not enough ratings yet to assess Scientific Calculator 991CW.

## Is Scientific Calculator 991CW legit?

Scientific Calculator 991CW appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Scientific Calculator 991CW is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.0.2 — 2026-10-23

The privacy policy and support links now open this app's Matinformatics pages.

### 2.0.1 — 2026-08-10

Calculation history now correctly restores previous expressions and results with the Up and Down replay controls, including after clearing the screen. Recalled calculations can now be edited naturally in Calculate, Complex, and Base-N modes. History navigation is also faster and more responsive.

### 2.0 — 2026-07-21

Version 2.0 refreshes the calculator with a larger, more consistent keypad, clearer symbols and labels, refined display spacing, improved exact radical and fraction rendering, portrait-only iPhone operation, and more accurate cursor navigation after calculations.

### 1.0.3 — 2026-07-14

Adds a new app icon and calculator-style HOME app glyphs. Fixes decimal digit grouping, improves FORMAT responsiveness and conversions, renders exact surd fractions with fully stretching radical bars, restores iOS 17 page arrows, keeps equation results visible above the keypad, and makes zero coefficient fields easier to replace.

### 1.0.2 — 2026-06-18

Fixes FORMAT result conversions and improves FORMAT menu responsiveness. Improves equation result visibility when the keypad is open and makes zero coefficient fields behave as placeholders for easier equation entry.

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## More apps by Murad Yaghi

- [Advanced Magnetometer](https://appshunter.io/ios/app/advanced-magnetometer/id6483363931)
- [Advanced Level](https://appshunter.io/ios/app/advanced-level/id6503284282)
- [Taybah Qibla](https://appshunter.io/ios/app/taybah-qibla/id6503632440)
- [Islam Pro: Prayer Times](https://appshunter.io/ios/app/islam-pro-prayer-times/id6773538624)
- [Scientific Calculator 991EX](https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317)

All apps by Murad Yaghi: https://appshunter.io/developer/1740110475

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*