# Aurora (MIDI Controller) vs VAPolyTZFM

The clearest difference is update cadence: Aurora (MIDI Controller) at every 8 days against VAPolyTZFM's every 9 months. Aurora (MIDI Controller) also leads on price ($2.99 vs $5.99). On rating, review sentiment, ratings volume and ads there is nothing between them.

Aurora (MIDI Controller) costs $2.99 and VAPolyTZFM $5.99 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 Aurora (MIDI Controller) against 5.0 for VAPolyTZFM. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

Aurora (MIDI Controller) ships an update every 8 days, VAPolyTZFM every 9 months. The most recent releases landed on June 3, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Aurora (MIDI Controller) | VAPolyTZFM |
| --- | --- | --- |
| Price | **$2.99** | $5.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/aurora-midi-controller/id1613073943/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/vapolytzfm/id6747690642/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 months |
| Monetization | Paid | Paid |
| Size | 6 MB | 17 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jason Snell](https://appshunter.io/developer/866134040) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### Aurora (MIDI Controller)

[App page](https://appshunter.io/ios/app/aurora-midi-controller/id1613073943)

Transform space weather data into musical expression with this live MIDI controller. Connect to your DAW and map real-time electromagnetic readings to create unique soundscapes and dynamic tracks.

**Highlights:** Live data streaming from observatories, Flexible MIDI mapping, Connects to DAWs like Ableton Live, Cross-platform compatibility (iOS, macOS), Creates ambient and techno music

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Aurora (MIDI Controller) free?

Aurora (MIDI Controller) costs $2.99, with no in-app purchases.

### Is VAPolyTZFM free?

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

### Which has better reviews, Aurora (MIDI Controller) or VAPolyTZFM?

Aurora (MIDI Controller) and VAPolyTZFM are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Aurora (MIDI Controller) or VAPolyTZFM have ads?

Neither Aurora (MIDI Controller) nor VAPolyTZFM shows ads.

### Which is updated more often, Aurora (MIDI Controller) or VAPolyTZFM?

Aurora (MIDI Controller) ships an update every 8 days, and VAPolyTZFM every 9 months. Most recently, Aurora (MIDI Controller) was updated on June 3, 2026 and VAPolyTZFM on September 6, 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.*