Matrix Vocoder vs SKIIID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Matrix Vocoder
Transform your voice into an electronic instrument with this app, simulating classic analog vocoder sounds. It analyzes input signals, performs spectral analysis, and reassembles synthetic speech using filter banks and replacement signals.
- 32 channel filterbank with analog filters
- Stereophonic synthesis with alias-free oscillators
- External carrier input
- Voiced/Unvoiced detection and pitch tracking
- Formant shift
- Patchbay for channel connection
- 16 internal oscillators for choir sounds
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Matrix Vocoder transforms your voice into an electronic instrument! The Vocoder was invented by Homer Dudley in the mid-30's of the last century. Dudley worked at Bell Laboratories, and this is where the first Vocoder took shape. The Matrix Vocoder is designed to properly simulate the classic analog Vocoder sound made famous e.g. by the music of the german band Kraftwerk. At there last world tour they used in fact the PC version of our Matrix Vocoder on stage ! The epic Cylon Robot voice is The basic function of a Vocoder is characterised by an analysis of the input signal, usually speech but other type of inputs can also be very interesting. In a special filter bank, a spectral analysis is performed and signals are developed which follows the amount of spectral energy in each channel. Another part of the analyser tests if there are unvoiced or voiced sounds at any particular time and extracts the pitch of the voiced sounds. The output section of the vocoder consists of a stereophonic synthesis filter bank which assembles the new synthetic speech from the characteristic filter envelopes from the analysis stage together with an external or internal replacement signal. - 32 channel Filterbank with 8-pole Butterworth analog filters - Stereophonic synthesis with analog modelled alias free oscillators. - External carrier possible ( left channel = voice / right channel = carrier ) - Voiced/Unvoiced detection - Pitch tracking - Formant shift - Matrix uses patchbay to connect analysis and synthesis channels. - Pan position and level for each channel. - 16 internal oscillators with unlimited voices for choir like sounds. - Stereo wide panorama parameter for internal generator. - Optional monophonic generator with Glide setting. - Internal noise generator. - Effect AudioUnit and Music Effect AudioUnit - stand alone / Audiobus 3 / IAA
SKIIID
This app is a percussion synthesizer designed for live performance. It features four morphing pads where finger position controls sound parameters and velocity. Explore deep sound design with a step sequencer, auto-mutation, and chaos engine for instant sound generation.
- Four morphing percussion pads
- Real-time parameter control via touch
- 16-step sequencer per pad
- Auto-mutate sound evolution
- Chaos engine for instant sound generation
- AUv3 plugin support
- MIDI input and Ableton Link sync
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SKIIID is a percussion synthesizer built for real-time performance. Four pads. Each one is a sound sculpted by where your finger lands. Move left or right to morph between synth parameters. Move up or down to control velocity. Simple to play, deep to explore. — PADS — Four independent drum voices. Each pad morphs between parameter extremes based on X-axis position. Velocity is Y-axis. — STEP SEQUENCER — 16-step sequencer per pad. Variable step length for polyrhythms. Reverse playback, shuffle, pin and random step modes. Sync to Ableton Link or run free. — AUTO-MUTATE — Evolves your sound automatically. Individual interval and intensity per pad, synced to tempo. — CHAOS ENGINE — RANDOM, CHAOS, and MUTATE modes generate new sounds instantly. — AUv3 PLUGIN — Run SKIIID inside AUM, ApeMatrix, Audiobus, or any AUv3 host. Multiple instances work independently — different patches, different sequencers, no shared state. — MIDI — MIDI In for pad triggering. MIDI Learn for external controller mapping. Ableton Link for tempo sync. — WORKS ON — iPhone and iPad, all modern screen sizes. Landscape mode.
Screenshots
Verdict
Matrix Vocoder and SKIIID both sit at 4.3 stars, but that hides the real split: 74% of SKIIID's written reviews are positive against 42% of Matrix Vocoder's. SKIIID also leads on update cadence (every 4 days vs every 15 months) and price ($3.99 vs $5.99). Matrix Vocoder's advantage is chart position (#181 vs unranked). On rating, ratings volume, ads and in-app purchases 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
Matrix Vocoder costs $5.99 and SKIIID $3.99 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 — 4.3 for Matrix Vocoder against 4.4 for SKIIID. Both are backed by a comparable volume of ratings — 20 and 31 respectively. Written reviews are what separate them: 42% of Matrix Vocoder's written reviews are positive against 74% of SKIIID's.
Matrix Vocoder ships an update every 15 months, SKIIID every 4 days. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.
| Parameter | Matrix Vocoder | SKIIID |
|---|---|---|
| Price | $5.99 | $3.99 — better |
| Rating | 4.3 (20 ratings) | 4.4 (31 ratings) — better |
| Positive reviews | 41.7% of reviews | 73.9% of reviews — better |
| Number of ratings | 20 | 31 — better |
| Update frequency | Every 15 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #181 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 9 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | Stephan Bolch |
Customer experience
Matrix Vocoder
SKIIID
In-app purchases
Matrix Vocoder
No in-app purchases
SKIIID
No in-app purchases









