Wavefolder vs Qwertet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Wavefolder
This app applies wavefolding, a technique used in modular synthesis and experimental music to add unique character and texture to sound. It differs from simple clipping by preserving amplitude information through a folding process.
- Wavefolding synthesis technique
- Adds character and aggression to sound
- Preserves amplitude information
- Experimental music production tool
- Modular synthesis application
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Wavefolding is widely used in modular synthesis and experimental music production to add character, aggression, or shimmer to sound sources. Unlike simple hard clipping, which crushes transients, wavefolding preserves amplitude information by folding back on itself.
Qwertet
Transform your typing keyboard into a versatile MIDI controller for iPad and iPhone. Explore four distinct layouts, from chromatic scales to one-key chords, and control pitch, modulation, and sustain. Use it standalone or as an AUv3 plugin within music production apps.
- Typing keyboard as MIDI controller
- USB and Bluetooth keyboard support
- Four distinct note layouts
- Pitch bend and modwheel shortcuts
- Sustain pedal functionality
- AUv3 plugin compatibility
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Connect a typing keyboard to your iPad or iPhone and it becomes a MIDI controller: USB or Bluetooth and works great with the iPad Magic Keyboard. Four layouts, from a plain piano to one-key chords. Run it on its own, or as an AUv3 inside AUM, Logic and the rest. No other hardware to buy. FOUR WAYS TO PLAY • Chromatic: laid out like a piano, with black key incidentals, pitch and modwheel shortcuts. • In-Key: set a key and lock yourself to its scale. Wrong notes are hard to play. • Fourths: a grid tuned in fourths, letting you transpose chord shapes across the scale. • Chord: one key, one chord. Major, minor, dim, aug or sus, with 6, m7, M7 or 9 on top. EXPRESSION, FROM THE KEYS • Number-row shortcuts for pitch bend and modwheel. • Hold the spacebar as a sustain pedal. • Shift switches between two velocities for extra dynamics. • Change the root, scale or octave and the whole board moves with it. TOUCH OR TYPE • Play the on-screen keys with your fingers, or connect a USB, Bluetooth or Magic Keyboard and type notes on real keys. • Every layout works both ways — no hardware needed to get started. WORKS EVERYWHERE • Standalone app, or an AUv3 MIDI plug-in inside AUM, Logic, Cubasis, Drambo and other hosts. • Sends to any CoreMIDI destination — hardware, other apps, or the host. • Includes a suite of instrument samples to audition QWERTET's layouts. • iPhone and iPad, iOS 16 and up. Want to test your keyboard to see how many simultaneous keys it supports? check out https://charles.pizza/apps/qwertet/ ONE THING TO KNOW Qwertet is designed to be used as a MIDI controller, not just a sound source — in CTRL mode, it doesn't make sound on its own. Pair it with a synth, sampler or your favourite AUv3 instrument to hear it.
Screenshots
Verdict
The clearest difference is price: Wavefolder at $1.99 against Qwertet's $4.99. Qwertet's advantage is ratings volume (4 vs 1). On rating, ads, in-app purchases and monetization model 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
Wavefolder costs $1.99 and Qwertet $4.99 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 Wavefolder against 5.0 for Qwertet. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
| Parameter | Wavefolder | Qwertet |
|---|---|---|
| Price | $1.99 — better | $4.99 |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Number of ratings | 1 | 4 — better |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Callback Audio, LLC | Charles Vestal |
Customer experience
Wavefolder
Qwertet
In-app purchases
Wavefolder
No in-app purchases
Qwertet
No in-app purchases









