Koto Master vs PolyQuad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koto Master
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The koto (箏) is a Japanese plucked half-tube zither instrument, and the national instrument of Japan. It is derived from the Chinese zheng and se, and similar to the Mongolian yatga, the Korean gayageum and ajaeng, the Vietnamese đàn tranh, the Sundanese kacapi and the Kazakhstan jetigen. Koto are roughly 180 centimetres (71 in) in length, and made from Paulownia wood (Paulownia tomentosa, known as kiri). The most common type uses 13 strings strung over movable bridges used for tuning, different pieces possibly requiring different tuning. 17-string koto are also common, and act as bass in ensembles. Koto strings are generally plucked using three fingerpicks (tsume), worn on the first three fingers of the right hand.
PolyQuad
Create complex analog-style synthesizer sounds using four independent voices. Design each voice with its own oscillator, filter, and envelopes, then combine them in various modes for massive layered textures, polyphonic chords, or unique stereo arrangements. Explore a vast library of presets or build your own from scratch.
- Four independent analog-style voices
- Multiple oscillator and filter types per voice
- Dual envelope generators per voice
- Three voice combination modes (UNI, POLY, 2x2)
- Extensive LFO modulation capabilities
- Integrated effects unit (reverb, delay, chorus, phaser, drive)
- 160 factory presets and user preset management
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PolyQuad is one synthesizer built from four complete voices — and the instrument is what they make together. Each of the four channels is a full analog-style voice: its own oscillator, its own resonant filter, its own envelopes, its own amplifier, its own place in the stereo field. Design each channel for a role — a sub, a body, a sparkle, a slow swell — then play them as one. Three voice modes decide how they combine. UNI stacks all four on every note for one massive layered sound. POLY spreads chords across the channels, so every note of a chord lands on its own instrument. 2×2 plays note pairs on matched couples. Add glide, retrigger control and detune spread on top. THE CHANNELS - Four oscillators: triangle, sawtooth, pulse with PWM, sine — per channel, with octave and fine tune - Four resonant filters with envelope amount and FM depth per channel - Two envelopes per channel (filter and amp), each with three time ranges from snappy to minutes-long - Per-channel VCA with velocity amount and curve, level, pan, AUX send, solo and mute - Per-channel oscilloscope displays, and keys that light up with the voice that took them MOTION - Four LFOs with five shapes, routed to pitch, pulse width, filter FM, resonance, amplitude, pan or send - Each channel decides how much modulation to accept — one LFO can wobble one channel and leave another still - One effect unit — reverb, delay, chorus, phaser, drive — fed by per-channel AUX sends with a master return PRESETS - 160 factory presets in eight categories: Pads, Keys, Strings, Bass, Lead, Drone, Texture, Percussion - Every preset uses the four channels as four different instruments — layered stacks, rotating timbres, per-drum kits - Channel presets: capture one channel's design and load it into any channel of any patch - Your presets are plain JSON files in the Files app — back them up, share them, drop new ones in IN THE STUDIO - AUv3 instrument for AUM, Drambo, Logic Pro, GarageBand and other hosts - MIDI 2.0 with 16-bit velocity; MIDI 1.0 hosts are translated automatically - Every knob on the panel is a host parameter — full automation and session recall - Standalone app with keyboard, so it plays on its own too No account, no ads, no tracking, no network. Your sounds stay on your device.
Screenshots
Verdict
The clearest difference is ads: PolyQuad at none against Koto Master's shown. Koto Master's advantage is price ($2.99 vs $6.99) and iOS requirement (11.0 vs 17.0). On in-app purchases 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
Koto Master costs $2.99 and PolyQuad $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Koto Master | PolyQuad |
|---|---|---|
| Price | $2.99 — better | $6.99 |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | — | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 130 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | SENSOR NOTES JOINT STOCK COMPANY | LASZLO DOBROVOLSZKI |
In-app purchases
Koto Master
No in-app purchases
PolyQuad
No in-app purchases









