# HemiSync vs Prognosticator AI

The clearest difference is in-app purchases: Prognosticator AI at none against HemiSync's 1. Prognosticator AI also leads on update cadence (every 8 days vs every 5 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. HemiSync sells 1 in-app purchase, starting at $0.99 per month. Prognosticator AI asks for nothing beyond the download.

HemiSync ships an update every 5 weeks, Prognosticator AI every 8 days. The most recent releases landed on November 5, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | HemiSync | Prognosticator AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (11 ratings)](https://appshunter.io/ios/app/hemisync/id6751762821/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 36 MB |
| Requires iOS | 18.4 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EngineZero](https://appshunter.io/developer/1573141529) | [Michael Kauffman](https://appshunter.io/developer/1843577500) |

## What reviewers say

### HemiSync

[App page](https://appshunter.io/ios/app/hemisync/id6751762821)

This app generates binaural beats and isochronic tones to aid in meditation and relaxation. Explore various sound frequencies and pre-set combinations for personal wellness routines, with customizable timers and controls.

**Highlights:** Binaural beat and isochronic tone generation, Customizable frequency ranges (Delta, Theta, Alpha, Beta, Gamma), Pre-configured audio presets, Session timer functionality, Solfeggio frequency options

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |


### Prognosticator AI

[App page](https://appshunter.io/ios/app/prognosticator-ai/id6753336452)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HemiSync free?

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

### Is Prognosticator AI free?

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

### Do HemiSync or Prognosticator AI have ads?

Neither HemiSync nor Prognosticator AI shows ads.

### Which is updated more often, HemiSync or Prognosticator AI?

HemiSync ships an update every 5 weeks, and Prognosticator AI every 8 days. Most recently, HemiSync was updated on November 5, 2026 and Prognosticator AI on November 8, 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.*