# VAPolyTZFM vs KR8

The clearest difference is price: KR8 at $2.99 against VAPolyTZFM's $14.99. KR8 also leads on update cadence (every 4 days vs every 9 months). VAPolyTZFM's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

VAPolyTZFM costs $14.99 and KR8 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VAPolyTZFM ships an update every 9 months, KR8 every 4 days. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | VAPolyTZFM | KR8 |
| --- | --- | --- |
| Price | $14.99 | **$2.99** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/vapolytzfm/id6747690642/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | Paid | — |
| Size | 17 MB | 5 MB |
| Requires iOS | **16.6** | 17 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Togawa](https://appshunter.io/developer/1474193056) | [devin sewell](https://appshunter.io/developer/716437457) |

## What reviewers say

### VAPolyTZFM

[App page](https://appshunter.io/ios/app/vapolytzfm/id6747690642)

This app is a polyphonic synthesizer that utilizes Through Zero FM for musical sound generation. It offers a standalone mode with Ableton Link and MIDI support, as well as an AudioUnit Extension for use with other music software. Built-in effects and iCloud Drive integration enhance its creative capabilities.

**Highlights:** Through Zero FM synthesis, AudioUnit Extension (AUv3) support, Ableton Link and MIDI connectivity, Built-in effects suite, iCloud Drive project sharing, Analog style step sequencer, Up to 8 voice polyphony

**Features:** Vision Pro support

**In-app purchases:** none


### KR8

[App page](https://appshunter.io/ios/app/kr8-0-drum-machine/id6761496294)

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

**In-app purchases:** none


## Frequently asked questions

### Is VAPolyTZFM free?

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

### Is KR8 free?

KR8 costs $2.99, with no in-app purchases.

### Do VAPolyTZFM or KR8 have ads?

Neither VAPolyTZFM nor KR8 shows ads.

### Which is updated more often, VAPolyTZFM or KR8?

VAPolyTZFM ships an update every 9 months, and KR8 every 4 days. Most recently, VAPolyTZFM was updated on November 5, 2026 and KR8 on November 1, 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.*