# PocketCAS vs Derivative Calculator Solver

The clearest difference is monetization model: PocketCAS at free against Derivative Calculator Solver's free with in-app purchases. PocketCAS also leads on rating (4.6 vs 4.3) and ratings volume (204 vs 12). Derivative Calculator Solver's advantage is iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PocketCAS sells 1 one-off in-app purchase and Derivative Calculator Solver sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PocketCAS holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: PocketCAS has 204 ratings behind it against 12, so its average is the more settled of the two.

PocketCAS ships an update every 3 months, Derivative Calculator Solver every 7 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | PocketCAS | Derivative Calculator Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (204 ratings)](https://appshunter.io/ios/app/pocketcas-graphing-calculator/id517249689/reviews)** | [4.3 (12 ratings)](https://appshunter.io/ios/app/derivative-calculator-solver/id1593820522/reviews) |
| Number of ratings | **204** | 12 |
| Positive reviews | 90.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 42 MB | 39 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timing Software GmbH](https://appshunter.io/developer/333261118) | [Asad Ahsan](https://appshunter.io/developer/1326954499) |

## What reviewers say

### PocketCAS

[App page](https://appshunter.io/ios/app/pocketcas-graphing-calculator/id517249689)

This advanced math application assists with a wide range of mathematical problems, from basic arithmetic to calculus, algebra, and statistics. It functions as a graphing calculator replacement, aids in homework, and supports complex calculations for academic and professional use.

**Highlights:** 2D and 3D plotting, Calculus functions (limits, derivatives), Linear algebra operations, Equation solving, Scripting language, Physical units and constants, iCloud sync

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PocketCAS Pro | $29.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 📊 Excellent graphing capabilities with 3D visualization
- 💰 Free version available with substantial features
- 🧮 Powerful mathematical computation engine
- 📱 Convenient mobile alternative to expensive calculators

**What reviewers complain about**

- 🐛 Recent updates cause crashes on older documents
- 💸 Expensive compared to free alternatives
- 🔒 Limited free version functionality
- 🎮 Clunky interface in some areas
- ❌ Cannot plot certain advanced functions

**Reported bugs**

- App crashes when loading previously saved documents
- Crashes with no error feedback or debugging information
- Cannot plot certain mathematical functions
- Zoom scaling issues with 3D graphs (scales Z-axis incorrectly)
- Compatibility broken with iOS 6 after iOS 7 update

**Requested features**

- Dark theme/dark mode for UI
- Multiple polynomials on single graph
- Inverse button functionality
- Better zoom functionality for 3D graphs
- Improved documentation and tutorials


### Derivative Calculator Solver

[App page](https://appshunter.io/ios/app/derivative-calculator-solver/id1593820522)

This app calculates the derivative of mathematical functions, providing step-by-step solutions and geometrical interpretations. It supports complex functions and offers an advanced keyboard for various mathematical operations. Results can be downloaded as a PDF.

**Highlights:** Derivative calculation, Step-by-step solutions, Geometrical interpretation, Advanced keyboard, PDF download, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Derivative Calculator Premium | $4.99 | one-time |


## Frequently asked questions

### Is PocketCAS free?

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

### Is Derivative Calculator Solver free?

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

### Which has better reviews, PocketCAS or Derivative Calculator Solver?

PocketCAS is rated higher. PocketCAS averages 4.6 out of 5 from 204 ratings, while Derivative Calculator Solver averages 4.3 from 12 ratings.

### Do PocketCAS or Derivative Calculator Solver have ads?

Neither PocketCAS nor Derivative Calculator Solver shows ads.

### Which is updated more often, PocketCAS or Derivative Calculator Solver?

PocketCAS ships an update every 3 months, and Derivative Calculator Solver every 7 months. Most recently, PocketCAS was updated on October 24, 2026 and Derivative Calculator Solver on October 20, 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.*