Qithesizer vs VAPolyMkII
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Qithesizer
This advanced music synthesizer combines virtual analog, wavetable, and physical modeling sound engines. It offers extensive modulation capabilities, a built-in sequencer, and on-screen keyboard for creating complex sounds.
- Multiple sound engines (virtual analog, wavetable, physical modeling)
- Extensive modulation sources and destinations
- Full MIDI mapping
- 16-step sequencer with pattern editor
- Waveform and dynamic visualizations
- On-screen keyboard
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Meet Qithesizer, a powerful multi-engine hybrid software synthesizer. Designed with wind controller in mind, it combines virtual analog, wavetable, and physical modeling in one. 【Features】 ∙ Multiple sound engines: basic waveforms, hundreds of digital waveforms, multiple physical models ∙ 11 modulation sources, 27 modulation destinations ∙ Full midi mapping ∙ 16-step sequencer with powerful pattern editor, save patterns by preset ∙ Waveform and dynamic visualizations ∙ Full-size, on-screen keyboard Our site: www.robkoo.com Facebook Page: @RobkooMusic Twitter: @Robkoo_Music Feedback: cuimingwei@robkoo.com
VAPolyMkII
This virtual analog synthesizer offers a 16-voice bitimbral polyphonic sound engine with two distinct filter models and extensive modulation options. It includes a built-in sequencer, various effects, and supports AudioUnit Extension for integration with DAWs. Projects can be synced across iPhone, iPad, and Mac via iCloud.
- 16-voice bitimbral polyphonic synthesizer
- Two analog-modeled filter types
- Extensive modulation capabilities
- Built-in piano roll sequencer
- Multiple audio effects
- AudioUnit Extension (AUv3) support
- iCloud Drive project syncing
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VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 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. The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. 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 16 voice bitimbral polyphonic synthesizer Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Patch points for modulation. 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. - 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.
Screenshots
Verdict
The clearest difference is rating: VAPolyMkII at 4.5 against Qithesizer's 4.1. VAPolyMkII also leads on update cadence (weekly vs fortnightly). Qithesizer's advantage is review sentiment (77% vs 67%) and price ($12.99 vs $14.99). 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
Qithesizer costs $12.99 and VAPolyMkII $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VAPolyMkII holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 11 and 11 respectively. Written reviews complicate that: 77% of Qithesizer's written reviews are positive against 67% of VAPolyMkII's, so the app with the better star average is not the one people write more warmly about.
Qithesizer ships an update fortnightly, VAPolyMkII weekly. The most recent releases landed on September 7, 2026 and September 20, 2026 respectively.
| Parameter | Qithesizer | VAPolyMkII |
|---|---|---|
| Price | $12.99 — better | $14.99 |
| Rating | 4.1 (11 ratings) | 4.5 (11 ratings) — better |
| Positive reviews | 76.9% of reviews — better | 66.7% of reviews |
| Number of ratings | 11 | 11 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 29 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Robkoo Information & Technologies Co., Ltd. | Ryo Togawa |
Customer experience
Qithesizer
VAPolyMkII
In-app purchases
Qithesizer
No in-app purchases
VAPolyMkII
No in-app purchases








