# Seyfert vs VAPolyPro

The clearest difference is price: Seyfert at $1.99 against VAPolyPro's $19.99. On rating, ratings volume, update cadence and ads there is nothing between them.

Seyfert costs $1.99 and VAPolyPro $19.99 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 Seyfert against 5.0 for VAPolyPro. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Seyfert | VAPolyPro |
| --- | --- | --- |
| Price | **$1.99** | $19.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/seyfert/id6794878287/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/vapolypro/id6801931805/reviews) |
| Number of ratings | **2** | 1 |
| 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 | 3 MB | 22 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## 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


### VAPolyPro

[App page](https://appshunter.io/ios/app/vapolypro/id6801931805)

Create a wide range of sounds with this polyphonic synthesizer, featuring multiple oscillator and filter types, MPE support, and built-in effects. It functions as a standalone app or an AudioUnit Extension for Mac and iOS devices, with iCloud Drive integration for project sharing.

**Highlights:** Multiple VCO and VCF types, Stereo VCF and VCA, MPE support, Built-in effects, Step sequencer, Audio Unit Extension (AUv3), iCloud Drive project sharing

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Seyfert free?

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

### Is VAPolyPro free?

VAPolyPro costs $19.99, with no in-app purchases.

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

Seyfert and VAPolyPro are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Seyfert or VAPolyPro have ads?

Neither Seyfert nor VAPolyPro shows ads.

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

Seyfert ships an update every 2 days, and VAPolyPro every 2 days. Most recently, Seyfert was updated on October 17, 2026 and VAPolyPro on October 14, 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.*