Krill Synthesizer vs VAPolyQuad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Krill Synthesizer
This virtual analog polyphonic synthesizer offers a streamlined interface for creating quick synth sounds on iPad. It features two oscillators, an LFO, a low-pass filter, two envelopes, and stereo effects, all accessible from a single screen.
- Virtual analog polyphonic synthesizer
- Single-screen interface
- Two oscillators
- One LFO
- Low-pass filter
- Stereo chorus and ping-pong delay
- 64 presets
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The GSi Krill Synthesizer was born from a design originally conceived to work as a mono synthesizer on an embedded processor (RP2040), then it was modified to be polyphonic for a more powerful processor (ARM H7) and finally we thought it would be perfect as a AUv3 for iPad, for those quick and dirty synth sounds you sometimes need without getting lost in endless parameter navigation and menu diving. So here it is, just one screen, one knob - one function, what you see is what you get. Two oscillators, one LFO, one low pass filter, two envelopes, stereo chorus, ping-pong delay, 64 presets. Have fun!
VAPolyQuad
Create rich, analog-style music with this powerful polyphonic synthesizer. Explore a vast array of sound-shaping tools, including multiple oscillators, filters, and effects. Program intricate melodies and rhythms with the built-in sequencer, and seamlessly share projects across your Apple devices.
- Virtual analog polyphonic synthesizer
- Up to 8 voice polyphony
- Four oscillators per voice
- Multiple resonant filters
- Built-in effects suite
- 16-bar sequencer with piano roll
- Audio Unit Extension (AUv3) support
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VAPolyQuad is a virtual analog polyphonic synthesizer for iPhone, iPad and Mac. It features 8 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. Single voice of the synthesizer features four oscillators, two mixers, two resonant high pass filters, two resonant low pass filters, two amplifiers, four ADSR envelopes and four LFOs. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - Virtual analog polyphonic synthesizer. Maximum 8 voice polyphony. it depends on performance of the device it is running. Four oscillators per voice. Flexible audio signal and control signal routing. Keyboard Control Routing Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Support MIDI 2.0 New User Interface built by SwiftUI for improved performance. Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation. Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. 370 Factory Presets - System Requirements - A13 Fusion or above is recommended. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension. Sound may be distorted if CPU of the device doesn't have enough power. If it happens reduce number of voices.
Screenshots
Verdict
The clearest difference is review sentiment: Krill Synthesizer at 100% against VAPolyQuad's 0%. Krill Synthesizer also leads on rating (5.0 vs 4.0) and update cadence (weekly vs every 22 months). On ratings volume, 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
Krill Synthesizer costs $11.99 and VAPolyQuad $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Krill Synthesizer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews point the same way: 100% of Krill Synthesizer's written reviews are positive against 0% of VAPolyQuad's.
Krill Synthesizer ships an update weekly, VAPolyQuad every 22 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.
| Parameter | Krill Synthesizer | VAPolyQuad |
|---|---|---|
| Price | $11.99 — better | $14.99 |
| Rating | 5.0 (6 ratings) — better | 4.0 (5 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 6 — better | 5 |
| Update frequency | Weekly — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 8 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Genuine Soundware | Ryo Togawa |
Customer experience
Krill Synthesizer
VAPolyQuad
In-app purchases
Krill Synthesizer
No in-app purchases
VAPolyQuad
No in-app purchases
Questions
Is Krill Synthesizer free?
Is VAPolyQuad free?
Which has better reviews, Krill Synthesizer or VAPolyQuad?
Do Krill Synthesizer or VAPolyQuad have ads?
Which is updated more often, Krill Synthesizer or VAPolyQuad?
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