# Sync Hemispheres vs ESP Challenge

Sync Hemispheres and ESP Challenge 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. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Sync Hemispheres | ESP Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sync-hemispheres/id6755691128/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free | — |
| Size | 138 MB | 6 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [John Paul Grigsby](https://appshunter.io/developer/1696719802) | [Alper Ozdil](https://appshunter.io/developer/1882639147) |

## What reviewers say

### Sync Hemispheres

[App page](https://appshunter.io/ios/app/sync-hemispheres/id6755691128)

Explore altered mental states through controlled brainwave stimulation. This app uses binaural beats and ambient sounds to help you achieve deeper rest, enhanced focus, and explore dream states. Customize your experience with adjustable brainwave frequencies and timed transitions.

**Highlights:** Binaural beat generation, Adjustable brainwave frequencies, Timed brainwave transitions, Ambient soundscapes, Brainwave state presets, Binaural beats and ambient sound blending

**Features:** Vision Pro support

**In-app purchases:** none


### ESP Challenge

[App page](https://appshunter.io/ios/app/esp-challenge/id6760099834)

**In-app purchases:** none


## Frequently asked questions

### Is Sync Hemispheres free?

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

### Is ESP Challenge free?

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

### Do Sync Hemispheres or ESP Challenge have ads?

Neither Sync Hemispheres nor ESP Challenge 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.*