# RP vs VAPoly16

The clearest difference is rating: VAPoly16 at 5.0 against RP's 3.9. VAPoly16 also leads on review sentiment (100% vs 70%). RP's advantage is price ($5.99 vs $14.99) and chart position (#200 vs unranked). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

RP costs $5.99 and VAPoly16 $14.99 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 3.9. Both are backed by a comparable volume of ratings — 15 and 13 respectively. Written reviews point the same way: 70% of RP's written reviews are positive against 100% of VAPoly16's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 26, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | RP | VAPoly16 |
| --- | --- | --- |
| Price | **$5.99** | $14.99 |
| Rating | [3.9 (15 ratings)](https://appshunter.io/ios/app/rp-1-delay/id1079530569/reviews) | **[5.0 (13 ratings)](https://appshunter.io/ios/app/vapoly16/id6450654065/reviews)** |
| Number of ratings | **15** | 13 |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | Paid |
| Best chart rank | **#200** | — |
| Size | 13 MB | 20 MB |
| Requires iOS | **9.0** | 16.4 |
| 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)

**Currently charting:** #200 Top Paid · Music (US App Store)

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


### VAPoly16

[App page](https://appshunter.io/ios/app/vapoly16/id6450654065)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RP free?

RP costs $5.99, with no in-app purchases.

### Is VAPoly16 free?

VAPoly16 costs $14.99, with no in-app purchases.

### Which has better reviews, RP or VAPoly16?

VAPoly16 is rated higher. RP averages 3.9 out of 5 from 15 ratings, while VAPoly16 averages 5.0 from 13 ratings.

### Do RP or VAPoly16 have ads?

Neither RP nor VAPoly16 shows ads.

### Which is updated more often, RP or VAPoly16?

RP ships an update every 2 months, and VAPoly16 every 2 months. Most recently, RP was updated on August 26, 2026 and VAPoly16 on September 20, 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.*