# ARIA ONE vs GRAB EM Field Synth

The clearest difference is price: ARIA ONE at Free against GRAB EM Field Synth's $3.99. ARIA ONE also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). GRAB EM Field Synth's advantage is in-app purchases (none vs 1) and update cadence (daily vs weekly). On ads there is nothing between them.

ARIA ONE is free to download; GRAB EM Field Synth costs $3.99 up front. ARIA ONE sells 1 one-off in-app purchase. GRAB EM Field Synth asks for nothing beyond the download.

ARIA ONE ships an update weekly, GRAB EM Field Synth daily. The most recent releases landed on October 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ARIA ONE | GRAB EM Field Synth |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | — | Paid |
| Size | 443 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Altitude Audio](https://appshunter.io/developer/1736195719) | [Hiroya Tanaka](https://appshunter.io/developer/1887542375) |

## What reviewers say

### ARIA ONE

[App page](https://appshunter.io/ios/app/aria-one/id6761255827)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ARIA AI Credits — 20 Pack | $19.99 | one-time |


### GRAB EM Field Synth

[App page](https://appshunter.io/ios/app/grab-em-field-synth/id6773259322)

This experimental synthesizer uses your iPhone's magnetic sensor to capture ambient electromagnetic waves and transform them into sound. Explore unique soundscapes by "playing" the electromagnetic noise from everyday electronics like power adapters and Wi-Fi routers.

**Highlights:** Electromagnetic wave to sound conversion, Multi-layered sound engine, Sensor-linked synth voices, Camera-driven tremolo effect, Bitcrush, comb filter, reverb, stutter effects, Ableton Link tempo synchronization, 3D point cloud frequency spectrum visualization

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

**In-app purchases:** none


## Frequently asked questions

### Is ARIA ONE free?

ARIA ONE is free to download, with in-app purchases available.

### Is GRAB EM Field Synth free?

GRAB EM Field Synth costs $3.99, with no in-app purchases.

### Do ARIA ONE or GRAB EM Field Synth have ads?

Neither ARIA ONE nor GRAB EM Field Synth shows ads.

### Which is updated more often, ARIA ONE or GRAB EM Field Synth?

ARIA ONE ships an update weekly, and GRAB EM Field Synth daily. Most recently, ARIA ONE was updated on October 28, 2026 and GRAB EM Field Synth on October 11, 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.*