# Thinkapp vs Inequality & System Solver

The clearest difference is ads: Thinkapp at none against Inequality & System Solver's shown. Thinkapp also leads on update cadence (every 10 days vs every 2 months) and iOS requirement (11.4 vs 15.0). On price, in-app purchases and device support there is nothing between them.

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

Thinkapp ships an update every 10 days, Inequality & System Solver every 2 months. Both last shipped on October 5, 2026.

## The numbers

| Metric | Thinkapp | Inequality & System Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (9 ratings)](https://appshunter.io/ios/app/inequality-and-system-solver/id1525084466/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 15 MB | 47 MB |
| Requires iOS | **11.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DESARROLLO4APP, S.L.](https://appshunter.io/developer/662575907) | [Francesco Varotti](https://appshunter.io/developer/1501752853) |

## What reviewers say

### Thinkapp

[App page](https://appshunter.io/ios/app/thinkapp/id1494500424)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Thinkapp free?

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

### Is Inequality & System Solver free?

Inequality & System Solver is free to download, with no in-app purchases.

### Do Thinkapp or Inequality & System Solver have ads?

Inequality & System Solver shows ads; Thinkapp does not.

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

Thinkapp ships an update every 10 days, and Inequality & System Solver every 2 months. Most recently, Thinkapp was updated on October 5, 2026 and Inequality & System Solver on October 5, 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.*