Comparison

RP vs VAPolyWest

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

Head to head
About

RP

This app offers dual stereo delay lines for a vast array of audio effects, from simple echoes to complex soundscapes. It features individual bypass, modulation routing, and tempo synchronization options.

Highlights
  • Dual stereo delay lines
  • High- and Lowpass filters
  • Stereo spread and Looping
  • Separate modulation delay
  • Tempo sync via AudioUnit Host or Ableton Link
  • Delay times from 10ms to 2000ms
Features
Read full description

RP-1 - Dual Digital Delay FX Two separate (stereo) delay lines allow for a wide range of effects ranging from basic slapback and ping-ping type echos to complex modulations and soundscapes. * Overview - Digital Stereo Delay with High- and Lowpass filters, Stereo spread and Looping - Separate modulation Delay for Chorus, Vibrato, Flanger, Panning, Phaser & Tremolo effects - Both sections can be bypassed individually - Mod section can be routed pre or post delay - Delay Times from 10ms to 2000ms (or 1/32 to 2bars) - Tempo Sync via AudioUnit Host or Ableton Link - Tap Temp and Manual Tempo - Normal, Dotted and Triplet - Stereo Spread - Simple 1-Button Looping * Connections - AudioUnitV3 Effect - Inter-App Audio Effect - Audiobus (Filter) - Ableton Link - USB Audio Interface - Microphone

About

VAPolyWest

This app is a polyphonic synthesizer inspired by 1960s California west coast synthesis. It features wave folding, lowpass gates, and step sequencers for generative music creation. It functions as a standalone app or an AudioUnit Extension across iPhone, iPad, and Mac.

Highlights
  • Virtual analog west coast style polyphonic synthesizer
  • Wave folder and lowpass gate
  • Step sequencer and envelope generators
  • Up to 8 voice polyphony
  • Audio Unit Extension (AUv3) support
  • MIDI 2.0 support
  • Audio export options
Features
Read full description

VAPolyWest is inspired by synthesizers developed in California in the 1960’s. VAPolyWest features wave folder and lowpass gate, which are key components of the west coast synthesis. VAPolyWest also features 5 step sequencer and envelope generators which are designed to create generative music. VAPolyWest works on iPhone, iPad and Mac. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. - Main Features - Virtual analog west coast style polyphonic synthesizer. Maximum 8 voice polyphony. it depends on performance of the device it is running. Wave folder and lowpass gate for West Coast Synthesis. Step sequencer and envelopes designed for generative music. Support MIDI 2.0 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. Sound may be distorted if CPU of the device doesn't have enough power. If it happens reduce number of voices.

Screenshots

RP3 screens
VAPolyWest4 screens

Verdict

The call

The clearest difference is rating: VAPolyWest at 5.0 against RP's 3.9. RP's advantage is update cadence (every 2 months vs every 10 months) and ratings volume (16 vs 5). 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

RP costs $2.99 and VAPolyWest $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

VAPolyWest holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 16 and 5 respectively. Written reviews point the same way: 70% of RP's written reviews are positive against 75% of VAPolyWest's.

UpkeepUpdate frequency

RP ships an update every 2 months, VAPolyWest every 10 months. Both last shipped on October 26, 2026.

Scorecard5 real differences · 5 level
RP versus VAPolyWest: the parameters behind the verdict, then further details
ParameterRPVAPolyWest
Price$2.99 — better$3.99
Rating3.9 (16 ratings)5.0 (5 ratings) — better
Positive reviews70.0% of reviews75.0% of reviews — better
Number of ratings16 — better5
Update frequencyEvery 2 months — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS9.0 — better16.6
Further details — not scored
Size13 MB15 MB
Age rating4+4+
DeveloperKai ArasRyo Togawa

Customer experience

RP

All ratings16 ratings
Positive68.8%
Neutral6.3%
Negative25.0%
Written reviews20 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

VAPolyWest

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

RP

No in-app purchases

None

VAPolyWest

No in-app purchases

Questions

Is RP free?
RP costs $2.99, with no in-app purchases.
Is VAPolyWest free?
VAPolyWest costs $3.99, with no in-app purchases.
Which has better reviews, RP or VAPolyWest?
VAPolyWest is rated higher. RP averages 3.9 out of 5 from 16 ratings, while VAPolyWest averages 5.0 from 5 ratings.
Do RP or VAPolyWest have ads?
Neither RP nor VAPolyWest shows ads.
Which is updated more often, RP or VAPolyWest?
RP ships an update every 2 months, and VAPolyWest every 10 months. Most recently, RP was updated on October 26, 2026 and VAPolyWest on October 26, 2026.

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