Comparison

Konstrukt vs Seyfert

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Konstrukt

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
Read full description

Konstrukt is a patchable instrument for iPad and iPhone. Design the surface you play, sequence it, give it sound with built-in instruments and your own AUv3 plug-ins, mix and record it — and when you want to go deeper, unlock the visual graph underneath and rewire all of it. Standalone, and as an AUv3 in your host. SURFACES YOU DESIGN • The KB-1 keyboard suite — piano, diatonic chord pads, scale-locked keyboard, MPE Seaboard ribbon, MPE Strings grid (4ths) and a 4×4 drum-pad grid, each with an arpeggiator. Successor to the KB-1 Expressive Keyboard Suite. • Knobs, faders, XY pads, buttons, live visualizers and channel strips on a snapping grid, in pages like hardware banks. Bind any control to MIDI CC — or, with the unlock, to any parameter in the patch. A SUITE OF SEQUENCERS • Drum, melody, chord, analog and CC lanes, the Drum Grid, a Metropolis-style Stage Seq and a Matrix note grid — tap to edit, with per-step velocity, probability, trigger conditions, ratchets and microtiming. • Patterns up to four bars, eight banks per lane. Record into patterns step by step or live, then fix it in the grid. A Looper with quantize, undo and expression capture. • Players: one tap on a lane writes a pattern from a style and a Complexity slider — drums with fills, a bass under your chords, chord stabs and pushes. • One patch key and scale every lane can follow, custom scales, and chord lanes with their own rhythm layer. INSTRUMENTS AND YOUR PLUG-INS • Built in: a two-oscillator Synth, a Wavetable synth, Drums, MegaSaw, a Sampler and a loop Slicer, plus Drive, Filter, Delay, Reverb, Compressor, EQ, Chorus and Phaser — each with its own panel. • Host your AUv3 instruments, effects and MIDI effects inside the patch (standalone app), with floating plug-in windows, presets and bindable parameters. THE RACK • A strip per instrument: fader, pan, mute and solo, inserts, pre- or post-fader sends to bus strips, sidechain, MIDI Learn, master inserts, and scenes recalled with a fade. Hardware synths join as External Instruments. • Bring a mic or guitar in on its own channel. Record the master and stems to 24-bit WAV. Tap tempo, metronome with count-in, Ableton Link, MIDI clock in and out. Multi-output routing on a multi-channel interface. UNLOCK — THE GRAPH EDITOR (in-app purchase) Everything above runs on one visual graph that carries MIDI and audio. Unlock the editor to rewire it: • 80+ node kinds — arps, scale quantizers, chords, echoes, swing, euclidean rhythms, LFOs and CC tools, wired MIDI In → processors → instruments or MIDI Out. • Components — save a cluster of nodes as one card with real ports, its surface cards included; drop saved components into any patch and edit them inside. • Audio on the same canvas — cable instruments through effect chains and hosted effects, split sends to buses, key a sidechain. The Rack is this graph seen as strips. • Emergence generators — Game of Life, Turing machine, Wolfram rules, Markov chains, bouncing balls, a Lorenz attractor — patterns that evolve instead of loop. Every keyboard is a routable node, every knob can drive any parameter. Factory graph patches open and play without the unlock. The unlock is the editor and nothing else. WITH HARDWARE, OTHER APPS OR A DESKTOP DAW • MIDI out over CoreMIDI, extra output ports and an always-on virtual port: 16 channels plus MPE. • One USB cable to a Mac, or Bluetooth MIDI — two MPE surfaces and a controller that reshapes per track, no driver needed. • As an AUv3, load Konstrukt as a MIDI processor or as an instrument in hosts such as AUM, Logic Pro, GarageBand, Cubasis, Drambo and Loopy Pro. PRICING One-time purchases, no subscription. The app is the whole instrument; the graph editor is a single optional unlock. One purchase covers iPad and iPhone. Requires iOS 17 or iPadOS 17 or later; on iPhone the app runs in landscape. Plug-in hosting, audio input and recording are part of the standalone app. No user data is collected.

About

Seyfert

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
Currently charting
Read full description

Seyfert is a delay unlike your others: every echo spawns at its own place in an orbit around you, and the whole constellation slowly revolves. Turn up Feedback and you don't just add repeats, you spawn more echoes into the orbit, from a single tight slap to a dense, spiralling cloud. Spin revolves the whole field around you. Doppler bends the echoes in pitch as they whirl toward and away. 3D wraps them around your head on headphones. Lift the repeats an octave into crystalline shimmer, drop them a sub-octave for weight, or detune them into a chorus. A lush reverb blooms around the echoes, never the dry signal, so your source stays clear while the repeats dissolve into space. Features: - Orbital echoes, where Feedback sets how many circle you - Spin, from a gentle drift to a full whirl - Doppler pitch-bend as the orbit turns - 3D binaural imaging for headphones - Shimmer and transpose, up or down one octave (octaves, fifths, sub-octaves) - Per-echo Trail tone, tape Wobble, and Drive - Lush reverb applied to the echoes - Full 5-band EQ on the wet signal - Orbit and Ping-Pong patterns, tempo sync - 18 factory presets, plus save your own - Standalone app and Audio Unit (AUv3) for GarageBand, AUM, Logic, and more No accounts, no tracking, no data collected. Everything stays on your device.

Screenshots

Konstrukt4 screens
Seyfert3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard9 real differences · 2 level
Konstrukt versus Seyfert: the parameters behind the verdict, then further details
ParameterKonstruktSeyfert
Price$7.99$1.99 — better
Rating4.8 (10 ratings)5.0 (3 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings10 — better3
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#190 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size65 MB3 MB
Age rating4+4+
DeveloperKai ArasKonstantin Torsten Schutz

Customer experience

Konstrukt

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Seyfert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Konstrukt

One-time1
  • Graph Editor Unlock$7.99
None

Seyfert

No in-app purchases

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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