# Scientific Calculator 991EX — Scientific Math, 12 Workspaces

> Scientific Math, 12 Workspaces (iPhone/iPad app by Murad Yaghi.)

- Source: https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317 (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 · 10 MB
- Languages: American English
- Released: 2026-09-01
- Data updated: 2026-09-12
- User reviews in markdown: https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317/reviews.md

## What is Scientific Calculator 991EX?

Scientific Calculator 991EX is a natural-display scientific calculator designed for students, engineers, and technical work. Calculate and Complex modes are free. One Lifetime Pro purchase permanently unlocks ten advanced workspaces:

• Base-N
• Matrix
• Vector
• Statistics
• Distribution
• Spreadsheet
• Table
• Equation/Func
• Inequality
• Ratio

Calculate with fractions, roots, trigonometry, logarithms, calculus, constants, unit conversions, complex numbers, matrices, vectors, statistics, probability distributions, spreadsheets, function tables, equations, inequalities, and ratios. Choose natural or linear input, convert supported 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.

Lifetime Pro is a one-time, non-consumable purchase handled by Apple. 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-991ex

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $14.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-01

No release notes.

## 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 FX-991CW](https://appshunter.io/ios/app/scientific-calculator-fx-991cw/id6777380822)

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 2026-09-12.*