# GrainProc vs echo~echo | êkhos

The clearest difference is price: echo~echo | êkhos at Free against GrainProc's $2.99. echo~echo | êkhos also leads on device support (5 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

echo~echo | êkhos is free to download; GrainProc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | GrainProc | echo~echo | êkhos |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.2 (18 ratings)](https://appshunter.io/ios/app/grainproc-granular-synthesis/id572380905/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 6 MB | 791 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple TV, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Mayank Sanganeria](https://appshunter.io/developer/527550366) | [United App Sp. z o.o.](https://appshunter.io/developer/6780957160) |

## What reviewers say

### GrainProc

[App page](https://appshunter.io/ios/app/grainproc-granular-synthesis/id572380905)

Create unique sounds and musical textures in real-time by processing external audio. This app features two parallel granular engines for layering sounds, offering a versatile tool for musicians and sound designers.

**Highlights:** Real-time granular synthesis, Two parallel grain engines, AudioBus input support, Waveform sound source manipulation, Control over volume, feedback, and density, Visual level monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


### echo~echo | êkhos

[App page](https://appshunter.io/ios/app/echoecho-ekhos/id6780960485)

**In-app purchases:** none


## Frequently asked questions

### Is GrainProc free?

GrainProc costs $2.99, with no in-app purchases.

### Is echo~echo | êkhos free?

echo~echo | êkhos is free to download, with no in-app purchases.

### Do GrainProc or echo~echo | êkhos have ads?

Neither GrainProc nor echo~echo | êkhos 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.*