# Midiflow Motion (Audiobus) vs Seyfert

The clearest difference is review sentiment: Seyfert at 100% against Midiflow Motion (Audiobus)'s 40%. Seyfert also leads on rating (5.0 vs 2.0) and update cadence (every 2 days vs every 11 months). Midiflow Motion (Audiobus)'s advantage is iOS requirement (10.2 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Midiflow Motion (Audiobus) costs $1.99 and Seyfert $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seyfert holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 40% of Midiflow Motion (Audiobus)'s written reviews are positive against 100% of Seyfert's.

Midiflow Motion (Audiobus) ships an update every 11 months, Seyfert every 2 days. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Midiflow Motion (Audiobus) | Seyfert |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/midiflow-motion-audiobus/id1107254489/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/seyfert/id6794878287/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 days** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#193** |
| Size | 5 MB | 3 MB |
| Requires iOS | **10.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) |

## What reviewers say

### Midiflow Motion (Audiobus)

[App page](https://appshunter.io/ios/app/midiflow-motion-audiobus/id1107254489)

Control effect parameters in other music apps by moving your device. Fine-tune MIDI commands like volume or modulation to your desired motion range for expressive control. Supports multiple parameters and apps simultaneously through Audiobus 3.

**Highlights:** Control effect parameters with device motion, Use device rotation (X/Y axis), Adjust motion and output value ranges, Send any MIDI command (pitch-bend, CC, custom), Control multiple parameters/apps simultaneously, Integrates with Audiobus 3

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

**In-app purchases:** none


### Seyfert

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

**Currently charting:** #193 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 Midiflow Motion (Audiobus) free?

Midiflow Motion (Audiobus) costs $1.99, with no in-app purchases.

### Is Seyfert free?

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

### Which has better reviews, Midiflow Motion (Audiobus) or Seyfert?

Seyfert is rated higher. Midiflow Motion (Audiobus) averages 2.0 out of 5 from 1 ratings, while Seyfert averages 5.0 from 3 ratings.

### Do Midiflow Motion (Audiobus) or Seyfert have ads?

Neither Midiflow Motion (Audiobus) nor Seyfert shows ads.

### Which is updated more often, Midiflow Motion (Audiobus) or Seyfert?

Midiflow Motion (Audiobus) ships an update every 11 months, and Seyfert every 2 days. Most recently, Midiflow Motion (Audiobus) was updated on November 2, 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.*