# keyOfMusic vs VAPolyLoop

The clearest difference is price: keyOfMusic at $0.99 against VAPolyLoop's $14.99. VAPolyLoop's advantage is ratings volume (3 vs 1). On rating, update cadence, ads and in-app purchases there is nothing between them.

keyOfMusic costs $0.99 and VAPolyLoop $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for keyOfMusic against 5.0 for VAPolyLoop. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 10, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | keyOfMusic | VAPolyLoop |
| --- | --- | --- |
| Price | **$0.99** | $14.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/keyofmusic/id6472669515/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/vapolyloop/id6758184778/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Paid | Paid |
| Size | 37 MB | 16 MB |
| Requires iOS | **15.2** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Jack McCormack](https://appshunter.io/developer/1658121467) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### keyOfMusic

[App page](https://appshunter.io/ios/app/keyofmusic/id6472669515)

This app provides a virtual piano keyboard to generate musical notes and display corresponding notation. It helps users practice perfect pitch, sight-reading, and understand key signatures, scales, and octaves. It also includes a feature to import and display sheet music images.

**Highlights:** Virtual piano keyboard with note generation, Display musical notation for played notes, Select key signatures, scales, and octaves, Toggle between flats and sharps, Import, save, and display sheet music images, Adjustable sheet music image size

**Features:** macOS Compatibility

**In-app purchases:** none


### VAPolyLoop

[App page](https://appshunter.io/ios/app/vapolyloop/id6758184778)

Create complex music with a polyphonic synthesizer and analog-style step sequencer. Features multiple oscillators, a resonant low-pass filter, distortion, and various built-in effects. Export audio in multiple formats and sync with other devices via Ableton Link.

**Highlights:** Polyphonic synthesizer with 3 oscillators, Analog-style step sequencer, Resonant low-pass filter, Distortion and other built-in effects (delay, reverb, EQ), Audio Unit Extension (AUv3) support, Ableton Link and MIDI 2.0 support, Audio export in AIFF, WAV, CAF, and AAC

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is keyOfMusic free?

keyOfMusic costs $0.99, with no in-app purchases.

### Is VAPolyLoop free?

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

### Which has better reviews, keyOfMusic or VAPolyLoop?

keyOfMusic and VAPolyLoop are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do keyOfMusic or VAPolyLoop have ads?

Neither keyOfMusic nor VAPolyLoop shows ads.

### Which is updated more often, keyOfMusic or VAPolyLoop?

keyOfMusic ships an update monthly, and VAPolyLoop monthly. Most recently, keyOfMusic was updated on October 10, 2026 and VAPolyLoop on September 27, 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.*