# Scientific Calculator Plus 991 vs Maple Calculator

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 (fortnightly vs every 2 months). On price, rating, in-app purchases and monetization model there is nothing between them.

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 13K 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 fortnightly, Maple Calculator every 2 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Scientific Calculator Plus 991 | Maple Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (13K ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995/reviews) | **[4.7 (1.5K ratings)](https://appshunter.io/ios/app/maple-calculator-math-solver/id1466659419/reviews)** |
| Number of ratings | **13K** | 1.5K |
| Positive reviews | **91.7% of reviews** | 62.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 169 MB | 69 MB |
| Requires iOS | **15** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Tran Duy](https://appshunter.io/developer/1449106994) | [Maplesoft](https://appshunter.io/developer/469981986) |

## What reviewers say

### Scientific Calculator Plus 991

[App page](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995)

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.

**Highlights:** Natural display input, Graphing module, Formula library, Unit and currency converter, Algebra and calculus tools, Matrix and vector operations, Statistical calculations

**Features:** Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator month subscription | $1.99 | per month |
| Calculator yearly subscription | $3.99 | per year |
| Calculator Premium | $5.99 | one-time |
| Calculator Pro | $5.99 | one-time |

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 🐛 Occasional bugs and input issues
- 🔀 Confusing layout and button placement
- 💰 Some advanced features locked behind paywall

**Reported bugs**

- Keyboard input stops working after switching screens
- Incorrect calculation results for certain operations
- App crashes on some devices after recent update

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/maple-calculator-math-solver/id1466659419)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $6.99 | per month |
| 6 months | $25.99 | per 6 months |
| 12 months | $29.99 | per year |

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 🚫 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

**Reported bugs**

- 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**

- More options
- Zoom for graphs in double direction separately
- Support for landscape mode
- Fundamental physical constants, or the ability to assign letters to constants


## Frequently asked questions

### Is Scientific Calculator Plus 991 free?

Scientific Calculator Plus 991 is free to download, with in-app purchases available.

### Is Maple Calculator free?

Maple Calculator is free to download, with in-app purchases available.

### Which has better reviews, Scientific Calculator Plus 991 or Maple Calculator?

Maple Calculator is rated higher. Scientific Calculator Plus 991 averages 4.7 out of 5 from 13K ratings, while Maple Calculator averages 4.7 from 1.5K ratings.

### Do Scientific Calculator Plus 991 or Maple Calculator have ads?

Scientific Calculator Plus 991 shows ads; Maple Calculator does not.

### Which is updated more often, Scientific Calculator Plus 991 or Maple Calculator?

Scientific Calculator Plus 991 ships an update fortnightly, and Maple Calculator every 2 months. Most recently, Scientific Calculator Plus 991 was updated on October 29, 2026 and Maple Calculator on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*