# Sing vs VAPolyMk4

The clearest difference is rating: VAPolyMk4 at 5.0 against Sing's 3.0. VAPolyMk4 also leads on review sentiment (100% vs 63%) and update cadence (every 2 months vs every 6 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Sing costs $4.99 and VAPolyMk4 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VAPolyMk4 holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 63% of Sing's written reviews are positive against 100% of VAPolyMk4's.

Sing ships an update every 6 months, VAPolyMk4 every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sing | VAPolyMk4 |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sing-intuna/id294767812/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/vapolymk4/id6753038075/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 62.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 2 MB | 20 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [HotPaw Productions](https://appshunter.io/developer/285074853) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### Sing

[App page](https://appshunter.io/ios/app/sing-intuna/id294767812)

Visualize your singing or instrument playing pitch with a color-coded graph. This app analyzes audio input to show if you are on, sharp, or flat, helping you train your ear for accurate intonation.

**Highlights:** Color-coded pitch graph, Real-time audio analysis, Visualizes pitch accuracy, Supports singing and instruments, Pitch frequency spectrum display, Monophonic pitch detection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### VAPolyMk4

[App page](https://appshunter.io/ios/app/vapolymk4/id6753038075)

This app is a powerful bi-timbral polyphonic synthesizer with advanced features like output morphing and a ring modulator. It offers extensive sound design capabilities with multiple oscillators, filters, and envelopes, and can be used standalone or as an AudioUnit Extension.

**Highlights:** Bi-timbral polyphonic synthesis, Output morphing and ring modulator, Multiple oscillators, filters, and envelopes, Standalone and AudioUnit Extension (AUv3) support, Built-in effects and piano roll sequencer, MIDI 2.0 and Ableton Link support, iCloud Drive for project sharing

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sing free?

Sing costs $4.99, with no in-app purchases.

### Is VAPolyMk4 free?

VAPolyMk4 costs $3.99, with no in-app purchases.

### Which has better reviews, Sing or VAPolyMk4?

VAPolyMk4 is rated higher. Sing averages 3.0 out of 5 from 2 ratings, while VAPolyMk4 averages 5.0 from 2 ratings.

### Do Sing or VAPolyMk4 have ads?

Neither Sing nor VAPolyMk4 shows ads.

### Which is updated more often, Sing or VAPolyMk4?

Sing ships an update every 6 months, and VAPolyMk4 every 2 months. Most recently, Sing was updated on October 29, 2026 and VAPolyMk4 on October 30, 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.*