# Isochronic Tone Generator vs Quell

Isochronic Tone Generator and Quell are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Isochronic Tone Generator sells 1 one-off in-app purchase and Quell sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Isochronic Tone Generator | Quell |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isochronic-tone-generator/id6774207589/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 58 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, Mac | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Nathan Mueller](https://appshunter.io/developer/1205886499) | [Oleksandr Pavlov](https://appshunter.io/developer/6775249707) |

## What reviewers say

### Isochronic Tone Generator

[App page](https://appshunter.io/ios/app/isochronic-tone-generator/id6774207589)

Create precise rhythmic audio pulses for meditation, focus, or breathwork. Customize frequency, carrier tone, and waveform for a personalized auditory experience. Enjoy a calm interface with background audio support.

**Highlights:** 1-50 Hz pulse control, Adjustable carrier tone, Multiple waveform options, Depth and softness controls, Background audio support, Minimal visualizer

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Isochronic Themes | $0.99 | one-time |


### Quell

[App page](https://appshunter.io/ios/app/quell-deep-focus/id6775249705)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quell Unlock | $9.99 | one-time |


## Frequently asked questions

### Is Isochronic Tone Generator free?

Isochronic Tone Generator is free to download, with in-app purchases available.

### Is Quell free?

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

### Do Isochronic Tone Generator or Quell have ads?

Neither Isochronic Tone Generator nor Quell 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.*