# GrainProc vs TraceSonic

The clearest difference is rating: TraceSonic at 5.0 against GrainProc's 4.2. TraceSonic also leads on update cadence (every 9 days vs every 2 months). GrainProc's advantage is price ($2.99 vs $7.99) and ratings volume (18 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

GrainProc costs $2.99 and TraceSonic $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TraceSonic holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: GrainProc has 18 ratings behind it against 1, so its average is the more settled of the two.

GrainProc ships an update every 2 months, TraceSonic every 9 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GrainProc | TraceSonic |
| --- | --- | --- |
| Price | **$2.99** | $7.99 |
| Rating | [4.2 (18 ratings)](https://appshunter.io/ios/app/grainproc-granular-synthesis/id572380905/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tracesonic/id6798317938/reviews)** |
| Number of ratings | **18** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 6 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Mayank Sanganeria](https://appshunter.io/developer/527550366) | [r6 appz](https://appshunter.io/developer/491984529) |

## 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


### TraceSonic

[App page](https://appshunter.io/ios/app/tracesonic/id6798317938)

Transform images into unique sounds by drawing on a spectral canvas. This app uses brush strokes and imported images to generate additive synthesis, offering a creative way to craft musical instruments and soundscapes.

**Highlights:** Draw on spectral canvas, Import images to create sound, 128 additive oscillators, Multiple brush types, Pitch snapping to scales, MIDI note input, Save custom patches

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GrainProc free?

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

### Is TraceSonic free?

TraceSonic costs $7.99, with no in-app purchases.

### Which has better reviews, GrainProc or TraceSonic?

TraceSonic is rated higher. GrainProc averages 4.2 out of 5 from 18 ratings, while TraceSonic averages 5.0 from 1 ratings.

### Do GrainProc or TraceSonic have ads?

Neither GrainProc nor TraceSonic shows ads.

### Which is updated more often, GrainProc or TraceSonic?

GrainProc ships an update every 2 months, and TraceSonic every 9 days. Most recently, GrainProc was updated on November 1, 2026 and TraceSonic on October 31, 2026.

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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.*