# EchoSketch vs Seyfert

The clearest difference is price: Seyfert at $1.99 against EchoSketch's $7.99. Seyfert also leads on iOS requirement (15.0 vs 17). On rating, ratings volume, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for EchoSketch against 5.0 for Seyfert. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | EchoSketch | Seyfert |
| --- | --- | --- |
| Price | $7.99 | **$1.99** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/echosketch-performance-delay/id6794466741/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/seyfert/id6794878287/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Paid | Paid |
| Size | 5 MB | 3 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Avi Bortnick](https://appshunter.io/developer/421929037) | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) |

## What reviewers say

### EchoSketch

[App page](https://appshunter.io/ios/app/echosketch-performance-delay/id6794466741)

Shape delay and reverb effects in real-time with a playable X/Y performance surface. Explore four distinct delay types and multiple reverb options, with extensive parameter control for unique sound morphing. Works as a standalone app or an Audio Unit plugin.

**Highlights:** X/Y performance surface for real-time sound shaping, Four distinct delay types: digital, analog, reverse, ping-pong, Spring, plate, and hall convolution reverb, Modulation and tone control for echoes, HOLD, LIFT, FREEZE, and MOTION performance gestures, Standalone app and AUv3 plugin compatibility

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is EchoSketch free?

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

### Is Seyfert free?

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

### Which has better reviews, EchoSketch or Seyfert?

EchoSketch and Seyfert are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do EchoSketch or Seyfert have ads?

Neither EchoSketch nor Seyfert shows ads.

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

EchoSketch ships an update every 2 days, and Seyfert every 2 days. Most recently, EchoSketch was updated on September 29, 2026 and Seyfert on October 1, 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.*