# Piano Level vs Hellion DSP

The clearest difference is ads: Hellion DSP at none against Piano Level's shown. Hellion DSP also leads on iOS requirement (12.0 vs 15.8.3). 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 | Piano Level | Hellion DSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hellion-dsp/id6752538750/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | — | Free |
| Size | 35 MB | 33 MB |
| Requires iOS | 15.8.3 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Michail Ustinov](https://appshunter.io/developer/1839760889) |

## What reviewers say

### Piano Level

[App page](https://appshunter.io/ios/app/piano-level/id6748528262)

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

**In-app purchases:** none


### Hellion DSP

[App page](https://appshunter.io/ios/app/hellion-dsp/id6752538750)

This app allows remote configuration of automotive processor amplifiers and audio processors. Adjust volume, select sources, set crossovers, manage channel levels, phase, time delays, and EQ. It also controls the media player on compatible models.

**Highlights:** Volume adjustment, Signal source selection, Crossover settings, Channel level and phase control, Time delay adjustment, Multi-band equalizer, Media player control

**In-app purchases:** none


## Frequently asked questions

### Is Piano Level free?

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

### Is Hellion DSP free?

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

### Do Piano Level or Hellion DSP have ads?

Piano Level shows ads; Hellion DSP 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.*