# Seyfert vs TraceSonic

The clearest difference is price: Seyfert at $1.99 against TraceSonic's $7.99. Seyfert also leads on update cadence (every 2 days vs every 9 days) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Seyfert costs $1.99 and TraceSonic $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seyfert ships an update every 2 days, TraceSonic every 9 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Seyfert | TraceSonic |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/seyfert/id6794878287/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Monetization | Paid | Paid |
| Size | 3 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) | [r6 appz](https://appshunter.io/developer/491984529) |

## What reviewers say

### Seyfert

[App page](https://appshunter.io/ios/app/seyfert/id6794878287)

This music effect plugin creates unique echoes that orbit and revolve around the listener. It offers advanced control over pitch, depth, and tone for each echo, with a built-in reverb and EQ for a rich soundscape. It functions as a standalone app or an Audio Unit for music production software.

**Highlights:** Orbital echo generation, Spin and Doppler pitch-bend effects, 3D binaural imaging, Octave shimmer and transpose, Per-echo tone and drive, Echo-focused reverb and EQ, Standalone and AUv3 support

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

**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 Seyfert free?

Seyfert costs $1.99, with no in-app purchases.

### Is TraceSonic free?

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

### Do Seyfert or TraceSonic have ads?

Neither Seyfert nor TraceSonic shows ads.

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

Seyfert ships an update every 2 days, and TraceSonic every 9 days. Most recently, Seyfert was updated on October 17, 2026 and TraceSonic on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*