# Inequality & System Solver vs Derivative Calculator Solver

The clearest difference is in-app purchases: Inequality & System Solver at none against Derivative Calculator Solver's 1. Inequality & System Solver also leads on update cadence (every 2 months vs every 7 months). Derivative Calculator Solver's advantage is ads (none vs shown). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Derivative Calculator Solver sells 1 one-off in-app purchase. Inequality & System Solver asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for Inequality & System Solver against 4.3 for Derivative Calculator Solver. Both are backed by a comparable volume of ratings — 9 and 12 respectively.

Inequality & System Solver ships an update every 2 months, Derivative Calculator Solver every 7 months. The most recent releases landed on October 5, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Inequality & System Solver | Derivative Calculator Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (9 ratings)](https://appshunter.io/ios/app/inequality-and-system-solver/id1525084466/reviews) | **[4.3 (12 ratings)](https://appshunter.io/ios/app/derivative-calculator-solver/id1593820522/reviews)** |
| Number of ratings | 9 | **12** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 47 MB | 39 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Francesco Varotti](https://appshunter.io/developer/1501752853) | [Asad Ahsan](https://appshunter.io/developer/1326954499) |

## What reviewers say

### Inequality & System Solver

[App page](https://appshunter.io/ios/app/inequality-and-system-solver/id1525084466)

This app provides step-by-step solutions for inequalities and systems of inequalities. It includes practice exercises, theory pages, and a dedicated math keyboard for easy input. Ideal for students and math enthusiasts seeking to understand and solve mathematical challenges.

**Highlights:** Step-by-step inequality solutions, Systems of inequalities solver, Practice exercises with solutions, Integrated theory pages, Dedicated math keyboard

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

**In-app purchases:** none


### 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 Inequality & System Solver free?

Inequality & System 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, Inequality & System Solver or Derivative Calculator Solver?

Derivative Calculator Solver is rated higher. Inequality & System Solver averages 4.2 out of 5 from 9 ratings, while Derivative Calculator Solver averages 4.3 from 12 ratings.

### Do Inequality & System Solver or Derivative Calculator Solver have ads?

Inequality & System Solver shows ads; Derivative Calculator Solver does not.

### Which is updated more often, Inequality & System Solver or Derivative Calculator Solver?

Inequality & System Solver ships an update every 2 months, and Derivative Calculator Solver every 7 months. Most recently, Inequality & System Solver was updated on October 5, 2026 and Derivative Calculator Solver on October 11, 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.*