# FX Calculus Problem Solver vs Derivative Calculator Solver

The clearest difference is rating: Derivative Calculator Solver at 4.3 against FX Calculus Problem Solver's 3.4. FX Calculus Problem Solver's advantage is in-app purchases (none vs 1) and ratings volume (78 vs 12). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Derivative Calculator Solver sells 1 one-off in-app purchase. FX Calculus Problem Solver asks for nothing beyond the download.

Derivative Calculator Solver holds the better App Store score, 4.3 against 3.4. That said, the two scores are not equally well evidenced: FX Calculus Problem Solver has 78 ratings behind it against 12, so its average is the more settled of the two.

FX Calculus Problem Solver ships an update every 5 months, Derivative Calculator Solver every 7 months. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | FX Calculus Problem Solver | Derivative Calculator Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (78 ratings)](https://appshunter.io/ios/app/fx-calculus-problem-solver/id833967111/reviews) | **[4.3 (12 ratings)](https://appshunter.io/ios/app/derivative-calculator-solver/id1593820522/reviews)** |
| Number of ratings | **78** | 12 |
| Positive reviews | 48.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 35 MB | 39 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Euclidus Inc](https://appshunter.io/developer/490623202) | [Asad Ahsan](https://appshunter.io/developer/1326954499) |

## What reviewers say

### 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


### 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 FX Calculus Problem Solver free?

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

### Is Derivative Calculator Solver free?

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

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

Derivative Calculator Solver is rated higher. FX Calculus Problem Solver averages 3.4 out of 5 from 78 ratings, while Derivative Calculator Solver averages 4.3 from 12 ratings.

### Do FX Calculus Problem Solver or Derivative Calculator Solver have ads?

Neither FX Calculus Problem Solver nor Derivative Calculator Solver shows ads.

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

FX Calculus Problem Solver ships an update every 5 months, and Derivative Calculator Solver every 7 months. Most recently, FX Calculus Problem Solver was updated on September 20, 2026 and Derivative Calculator Solver on September 22, 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.*