# Polynomial vs Direct Proportion

The clearest difference is ads: Direct Proportion at none against Polynomial's shown. Direct Proportion also leads on iOS requirement (12.0 vs 15.1). 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.

## The numbers

| Metric | Polynomial | Direct Proportion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | — |
| Size | 41 MB | 50 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Polynomial

[App page](https://appshunter.io/ios/app/polynomial-solver/id1619312565)

**Features:** macOS Compatibility

**In-app purchases:** none


### Direct Proportion

[App page](https://appshunter.io/ios/app/direct-proportion/id6736588837)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Polynomial free?

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

### Is Direct Proportion free?

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

### Do Polynomial or Direct Proportion have ads?

Polynomial shows ads; Direct Proportion does not.

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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.*