# SimpleTone vs GRAB EM Field Synth

The clearest difference is price: SimpleTone at Free against GRAB EM Field Synth's $3.99. GRAB EM Field Synth's advantage is iOS requirement (17.0 vs 26.1). On ads, in-app purchases and device support there is nothing between them.

SimpleTone is free to download; GRAB EM Field Synth costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | SimpleTone | GRAB EM Field Synth |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simpletone/id6760437802/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Daily |
| Monetization | **Free** | Paid |
| Size | 2 MB | 2 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Evan Brass](https://appshunter.io/developer/821378174) | [Hiroya Tanaka](https://appshunter.io/developer/1887542375) |

## What reviewers say

### SimpleTone

[App page](https://appshunter.io/ios/app/simpletone/id6760437802)

This application provides a straightforward virtual tuning fork. Simply select your desired pitch to tune your instrument. It aims to offer a no-nonsense, ad-free experience for musicians.

**Highlights:** Virtual tuning fork, Pitch selection, Ad-free experience, Simple interface

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

**In-app purchases:** none


### 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 SimpleTone free?

SimpleTone is free to download, with no in-app purchases.

### Is GRAB EM Field Synth free?

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

### Do SimpleTone or GRAB EM Field Synth have ads?

Neither SimpleTone nor GRAB EM Field Synth shows ads.

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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.*