Scientific Calculator fx-991
Dinh Phuc Education iPhoneiPadiPod touch
Scientific Calculator fx-991 is a free Education app for iPhone and iPad by Dinh Phuc. Rated 4.6/5 from 445 ratings. Requires iOS 15.0.
- Rating
- 4.6
- 445 ratings
- Price
- Free
- on the App Store
- Size
- 27 MB
- Age 4+
- Updated
- Oct 23
- 2026 · v1.9.3
Screenshots
About Scientific Calculator fx-991
Scientific Calculator fx-991 – The Ultimate Math & Science Tool! Struggling with math problems, equations, or integrals? Need a powerful scientific calculator to solve step-by-step? With Scientific Calculator fx-991, you can calculate, graph, and find formulas instantly – making learning math, physics, and chemistry easier than ever! Key Features + Step-by-step equation solver – Enter any equation and get a detailed step-by-step solution. + Advanced scientific functions – Solve fractions, algebra, derivatives, integrals, trigonometry, and more. + Graphing mode – Visualize mathematical functions interactively. + Extensive formula library – Access key formulas for math, physics, and chemistry in seconds. + Unit converter – Quickly convert between different measurement units. + Casio fx-991 inspired interface – A familiar and intuitive experience for students. Perfect for high school and college students, engineers, and professionals in STEM fields! Who is this app for? High school students – Solve algebra, calculus, and physics problems efficiently. College & university students – Master engineering, physics, and complex math subjects. STEM professionals – Perform advanced calculations quickly and accurately. Download Scientific Calculator fx-991 now and simplify your calculations! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/.
Ratings & reviews
4.6
445 ratings
What’s new
Version 1.9.3 · Updated October 23, 2026
- Added Daily Challenge with 10 new math questions every day. - Track your personal progress and compete on the 7-day leaderboard.
App privacy
The developer, Dinh Phuc, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
Used for: Third-Party Advertising
Alternatives to Scientific Calculator fx-991
Looking for apps like Scientific Calculator fx-991? Here are 6 similar apps on the App Store. The highest rated is Scientific Calculator Plus 991 (4.7/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Scientific Calculator fx-991 | 4.6 / 5 (445 ratings) | Free | October 23, 2026 | |
| Scientific Calculator Plus 991 | 4.7 / 5 (12,540) | Free | Oct 22, 2026 | Compare |
| GeoGebra Calculator Suite | 4.3 / 5 (61) | Free | Oct 12, 2026 | Compare |
| GeoGebra Graphing Calculator | 4.3 / 5 (284) | Free | Oct 12, 2026 | Compare |
| Symbolab - AI Math Solver App | 4.6 / 5 (26,241) | Free | Oct 15, 2026 | Compare |
| GeoGebra 3D Calculator | 4.0 / 5 (52) | Free | Oct 12, 2026 | Compare |
| Taculator 84 Graphing Calc | 4.5 / 5 (7,655) | Free | Oct 9, 2026 | Compare |