# Konstrukt vs Seyfert

The clearest difference is in-app purchases: Seyfert at none against Konstrukt's 1. Seyfert also leads on review sentiment (100% vs 67%) and price ($1.99 vs $7.99). Konstrukt's advantage is ratings volume (10 vs 3). On ads and device support there is nothing between them.

Konstrukt costs $7.99 and Seyfert $1.99 up front. Konstrukt sells 1 one-off in-app purchase. Seyfert asks for nothing beyond the download.

Seyfert holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 10 and 3 respectively. Written reviews point the same way: 67% of Konstrukt's written reviews are positive against 100% of Seyfert's.

Konstrukt ships an update every 5 days, Seyfert every 2 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Konstrukt | Seyfert |
| --- | --- | --- |
| Price | $7.99 | **$1.99** |
| Rating | [4.8 (10 ratings)](https://appshunter.io/ios/app/konstrukt/id6779712751/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/seyfert/id6794878287/reviews)** |
| Number of ratings | **10** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#190** |
| Size | 65 MB | 3 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) |

## What reviewers say

### Konstrukt

[App page](https://appshunter.io/ios/app/konstrukt/id6779712751)

Design custom MIDI control surfaces with a variety of instruments and sequencers. Unlock advanced features like a visual MIDI processing graph for complex routing and generative music creation. Use it standalone, as an AUv3 plugin, or to control desktop DAWs.

**Highlights:** Customizable touch surface design, KB-1 keyboard suite with MPE support, Advanced step and matrix sequencers, Visual MIDI processing graph, Built-in instruments and samplers, Connects to desktop DAWs via USB or Bluetooth

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Graph Editor Unlock | $7.99 | one-time |


### Seyfert

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

**Currently charting:** #190 Top Paid · Music (US App Store)

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 Konstrukt free?

Konstrukt costs $7.99, and also offers in-app purchases.

### Is Seyfert free?

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

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

Seyfert is rated higher. Konstrukt averages 4.8 out of 5 from 10 ratings, while Seyfert averages 5.0 from 3 ratings.

### Do Konstrukt or Seyfert have ads?

Neither Konstrukt nor Seyfert shows ads.

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

Konstrukt ships an update every 5 days, and Seyfert every 2 days. Most recently, Konstrukt was updated on November 10, 2026 and Seyfert on November 6, 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.*