# PocketCAS vs FX Calculus Problem Solver

The clearest difference is rating: PocketCAS at 4.6 against FX Calculus Problem Solver's 3.4. PocketCAS also leads on review sentiment (91% vs 48%) and monetization model (free vs free with in-app purchases). FX Calculus Problem Solver's advantage is iOS requirement (11.0 vs 18.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PocketCAS holds the better App Store score, 4.6 against 3.4. Both are backed by a comparable volume of ratings — 204 and 78 respectively. Written reviews point the same way: 91% of PocketCAS's written reviews are positive against 48% of FX Calculus Problem Solver's.

PocketCAS ships an update every 3 months, FX Calculus Problem Solver every 5 months. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PocketCAS | FX Calculus Problem Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (204 ratings)](https://appshunter.io/ios/app/pocketcas-graphing-calculator/id517249689/reviews)** | [3.4 (78 ratings)](https://appshunter.io/ios/app/fx-calculus-problem-solver/id833967111/reviews) |
| Number of ratings | **204** | 78 |
| Positive reviews | **90.8% of reviews** | 48.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 42 MB | 35 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timing Software GmbH](https://appshunter.io/developer/333261118) | [Euclidus Inc](https://appshunter.io/developer/490623202) |

## 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:** none

**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


### FX Calculus Problem Solver

[App page](https://appshunter.io/ios/app/fx-calculus-problem-solver/id833967111)

Solve calculus homework and textbook problems with this comprehensive math software. It offers animated solution steps, a scientific and graphing calculator, and an intuitive editor for typing in your own problems. Ideal for students preparing for exams.

**Highlights:** Animated step-by-step solutions, Scientific calculator, Graphing calculator, Automatic problem solving, Math problem expression editor, Over 1,000 sample problems

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent for learning calculus
- 👍 Step-by-step solutions provided
- 👍 Helpful for reviewing concepts
- 👍 Good for checking homework answers
- 👍 Can simplify complex problems

**What reviewers complain about**

- 😞 Frequent crashes and freezing
- 😞 Inaccurate answers for some problems
- 😞 "Scam" due to payment issues
- 😞 Premium version stops working after purchase
- 😞 Paid content is essential

**Reported bugs**

- App crashes when launching animated solutions board
- App crashes after solving 2-3 operations
- App freezes when clicking solve button
- App crashes when hitting solve button
- App stops working after paying for premium

**Requested features**

- Add summation functionality
- Add trigonometry functions and equations
- Add camera recognition for problems
- Add curve fitting feature
- Add INC and DEC coordinates on graph


## Frequently asked questions

### Is PocketCAS free?

PocketCAS is free to download, with no in-app purchases.

### Is FX Calculus Problem Solver free?

FX Calculus Problem Solver is free to download, with no in-app purchases.

### Which has better reviews, PocketCAS or FX Calculus Problem Solver?

PocketCAS is rated higher. PocketCAS averages 4.6 out of 5 from 204 ratings, while FX Calculus Problem Solver averages 3.4 from 78 ratings.

### Do PocketCAS or FX Calculus Problem Solver have ads?

Neither PocketCAS nor FX Calculus Problem Solver shows ads.

### Which is updated more often, PocketCAS or FX Calculus Problem Solver?

PocketCAS ships an update every 3 months, and FX Calculus Problem Solver every 5 months. Most recently, PocketCAS was updated on October 19, 2026 and FX Calculus Problem Solver on October 15, 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.*