VAPoly16 vs isxynth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VAPoly16
This app is a virtual analog polyphonic synthesizer for iOS and Mac. It offers 16 voices, a sequencer, and various audio effects. It can be used as a standalone application or as an AudioUnit Extension.
- 16 voice virtual analog synthesizer
- Bitimbral sound design
- Sequencer with piano roll and automation
- Multiple audio effects (delay, reverb, chorus, etc.)
- Standalone and AUv3 extension support
- Ableton Link and MIDI connectivity
- Audio file export
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VAPoly16 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 for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and 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 Sequencer 16 bar patterns per clip. Total 16 clips. Parameter automation. Audio Export Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive. Support Ableton Link, Bluetooth MIDI, MIDI In / Out. System Requirements For iOS Devices, A10 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.
isxynth
This music effect plugin allows spectral cross synthesis and morphing between two input signals. It separates noise and tone components, offering controls for blending, freezing, and time-based delays. Gestures on controls can be recorded and played back for dynamic sound shaping.
- Spectral cross synthesis
- Morphing between two input signals
- Noise and tone component blending
- Freeze control for spectral blurring
- 3-second delay lines per input
- Gesture recording and playback
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isxysnth is spectral cross synthesis / morphing plugin it gets two input signals, splits each one into 2 parts containing noise and tone components and then allows morphing between all these elements. Freeze control allows spectral blurring-like effect for both input signals, two 3 second delay lines allow selection of different signal in time and also provide "freeze" effect you can process left and right channels on stereo source or use this effect as multi-input AUv3 - in that case it will use 2 stereo inputs. Standalone mode currently works only in "mono" mode - three XY controls set balance between tone and noise components, amount of freeze and set up morphing - both inputs have 3-second delay line; freeze button ("*") toggles off recording. - gestures on all the main controls (3 xy pads and two sliders) can be recorded and played back when appropriate button with ">" label is toggled on - in current version standalone app supports only mono (L + R as inputs I and II) processing
Screenshots
Verdict
The clearest difference is rating: VAPoly16 at 5.0 against isxynth's 3.7. VAPoly16 also leads on update cadence (every 2 months vs every 34 months) and ratings volume (13 vs 3). isxynth's advantage is price ($7.99 vs $14.99) and iOS requirement (11.0 vs 16.4). On review sentiment, 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
VAPoly16 costs $14.99 and isxynth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VAPoly16 holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 13 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
VAPoly16 ships an update every 2 months, isxynth every 34 months. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.
| Parameter | VAPoly16 | isxynth |
|---|---|---|
| Price | $14.99 | $7.99 — better |
| Rating | 5.0 (13 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 13 — better | 3 |
| Update frequency | Every 2 months — better | Every 34 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.4 | 11.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryo Togawa | Alexey Nadzharov |
Customer experience
VAPoly16
isxynth
In-app purchases
VAPoly16
No in-app purchases
isxynth
No in-app purchases









