# Concentrations vs Quadratic Equations to Solve

The clearest difference is device support: Quadratic Equations to Solve at 3 against Concentrations's 1. Quadratic Equations to Solve also leads on iOS requirement (12.0 vs 18.5). On price, ads and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Concentrations | Quadratic Equations to Solve |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 7 MB | 22 MB |
| Requires iOS | 18.5 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Marcal Casas Cartagena](https://appshunter.io/developer/468150889) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Concentrations

[App page](https://appshunter.io/ios/app/concentrations/id468150886)

**In-app purchases:** none


### Quadratic Equations to Solve

[App page](https://appshunter.io/ios/app/quadratic-equations-to-solve/id6742703121)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentrations free?

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

### Is Quadratic Equations to Solve free?

Quadratic Equations to Solve is free to download, with no in-app purchases.

### Do Concentrations or Quadratic Equations to Solve have ads?

Neither Concentrations nor Quadratic Equations to Solve shows ads.

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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.*