# RP vs VAPolyWest

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.

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

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.

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

## The numbers

| Metric | RP | VAPolyWest |
| --- | --- | --- |
| Price | **$2.99** | $3.99 |
| Rating | [3.9 (16 ratings)](https://appshunter.io/ios/app/rp-1-delay/id1079530569/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/vapolywest/id6587550154/reviews)** |
| Number of ratings | **16** | 5 |
| Positive reviews | 70.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Paid | Paid |
| Size | 13 MB | 15 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### RP

[App page](https://appshunter.io/ios/app/rp-1-delay/id1079530569)

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:** Vision Pro support

**In-app purchases:** none


### VAPolyWest

[App page](https://appshunter.io/ios/app/vapolywest/id6587550154)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*