# HHL algorithm vs Fourier App

The clearest difference is ads: HHL algorithm at none against Fourier App's shown. Fourier App's advantage is iOS requirement (13.0 vs 16.6). 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 | HHL algorithm | Fourier App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 months |
| Size | 6 MB | 30 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Sthefano Schiavon](https://appshunter.io/developer/1882733645) |

## What reviewers say

### HHL algorithm

[App page](https://appshunter.io/ios/app/hhl-algorithm/id6756808200)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fourier App

[App page](https://appshunter.io/ios/app/fourier-app/id6760314201)

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

**In-app purchases:** none


## Frequently asked questions

### Is HHL algorithm free?

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

### Is Fourier App free?

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

### Do HHL algorithm or Fourier App have ads?

Fourier App shows ads; HHL algorithm 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.*