Comparison

VAPoly16 vs isxynth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

VAPoly164 screens
isxynth3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

VAPoly16 costs $14.99 and isxynth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
VAPoly16 versus isxynth: the parameters behind the verdict, then further details
ParameterVAPoly16isxynth
Price$14.99$7.99 — better
Rating5.0 (13 ratings) — better3.7 (3 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings13 — better3
Update frequencyEvery 2 months — betterEvery 34 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.411.0 — better
Further details — not scored
Size20 MB8 MB
Age rating4+4+
DeveloperRyo TogawaAlexey Nadzharov

Customer experience

VAPoly16

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

isxynth

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

VAPoly16

No in-app purchases

None

isxynth

No in-app purchases

Questions

Is VAPoly16 free?
VAPoly16 costs $14.99, with no in-app purchases.
Is isxynth free?
isxynth costs $7.99, with no in-app purchases.
Which has better reviews, VAPoly16 or isxynth?
VAPoly16 is rated higher. VAPoly16 averages 5.0 out of 5 from 13 ratings, while isxynth averages 3.7 from 3 ratings.
Do VAPoly16 or isxynth have ads?
Neither VAPoly16 nor isxynth shows ads.
Which is updated more often, VAPoly16 or isxynth?
VAPoly16 ships an update every 2 months, and isxynth every 34 months. Most recently, VAPoly16 was updated on September 20, 2026 and isxynth on September 24, 2026.

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