Konstrukt vs P422 Fairuz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Konstrukt
Design your own playable surfaces, sequence them, and create sounds with built-in instruments or your own AUv3 plugins. Mix and record your creations, then unlock a visual graph to rewire everything for deeper control. It functions as a standalone app or an AUv3 within other hosts.
- Customizable playable surfaces
- Advanced sequencing capabilities
- Built-in and AUv3 instrument hosting
- Visual graph editor for deep control
- Multi-track recording and mixing
- MIDI and audio routing
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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.
P422 Fairuz
This app offers a powerful four-band parametric equalizer with selectable curves and proportional Q for precise sound shaping. It emulates classic op-amp circuits, adding harmonic density and character, with features like a sub-bass circuit and input transformer control.
- Four op-amp EQ bands with Bell/Contour/Contour X2 shapes
- Proportional Q for musical width
- TREMOR sub-bass circuit
- VOICE input transformer and HAMMER output stage saturation
- Real-time spectrum analyzer
- AUv3 plugin and standalone app
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P422 Fairuz is a four-band op-amp parametric EQ that moves past hardware — the punch and harmonic density of classic op-amp circuits, with capabilities the originals never had. Shape your sound with HIGH, HI-MID, LO-MID and LOW bands, each with three selectable curves (Bell, Contour, Contour X2) and proportional Q: wide stays wide, narrow finds itself. LO and HI shelves with complementary dip behavior, switchable HPF/LPF, and the TREMOR circuit laying a sub-bass foundation below 30 Hz. Character comes from the circuit, not just the curve: OUT drives the op-amp output stage, VOICE adds drive on top of it, and HAMMER adds the output transformer after it, for body, density and saturation — op-amp color available even with the EQ bands off. Blend it all in parallel with the MIX control, no DAW routing needed. FEATURES - Four op-amp EQ bands with Bell / Contour / Contour X2 shapes - Proportional Q — musical at any width - Stepped or continuous frequency modes - LO / HI shelves with complementary dip - TREMOR sub-bass circuit below 30 Hz - Switchable HPF / LPF with position options - Op-amp output stage: OUT drive, VOICE drive and the HAMMER output transformer - MIX parallel blend and Dual Mono L/R behavior - Spectrum visualizer: drag the band dots, tap one for its card; IN/OUT analyzer with freeze, range, resolution, speed and tilt - A/B states and 276 factory presets with notes, tags, search and favorites - Out & Trim linked gain staging - Zero latency, optional oversampling FORMATS - AUv3 plug-in for AUM, Logic Pro, GarageBand, Cubasis and other AUv3 hosts - Standalone app with mic/interface input Bring console-grade op-amp tone to your iPad and iPhone.
Screenshots
Verdict
The clearest difference is price: Konstrukt at $7.99 against P422 Fairuz's $19.99. Konstrukt also leads on ratings volume (10 vs 1) and chart position (#170 vs unranked). P422 Fairuz's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 67%). On update cadence, 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
Konstrukt costs $7.99 and P422 Fairuz $19.99 up front. Konstrukt sells 1 one-off in-app purchase. P422 Fairuz asks for nothing beyond the download.
P422 Fairuz holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Konstrukt has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of Konstrukt's written reviews are positive against 100% of P422 Fairuz's.
Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.
| Parameter | Konstrukt | P422 Fairuz |
|---|---|---|
| Price | $7.99 — better | $19.99 |
| Rating | 4.8 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 5 days | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #170 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 65 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Aras | Pulsar Modular |
Customer experience
Konstrukt
P422 Fairuz
In-app purchases
Konstrukt
- Graph Editor Unlock$7.99
P422 Fairuz
No in-app purchases









