# Calmr CoParent vs Sync Hemispheres

The clearest difference is in-app purchases: Sync Hemispheres at none against Calmr CoParent's 1. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Calmr CoParent sells 1 in-app purchase, starting at $9.99 per month. Sync Hemispheres asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Calmr CoParent against 5.0 for Sync Hemispheres. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Calmr CoParent ships an update every 9 days, Sync Hemispheres weekly. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Calmr CoParent | Sync Hemispheres |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/calmr-coparent/id6754519300/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/sync-hemispheres/id6755691128/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 138 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Calmr Corp](https://appshunter.io/developer/1848604586) | [John Paul Grigsby](https://appshunter.io/developer/1696719802) |

## What reviewers say

### Calmr CoParent

[App page](https://appshunter.io/ios/app/calmr-coparent/id6754519300)

This app helps separated parents communicate calmly and constructively. It uses AI to guide conversations, prevent conflict, and provide structured records for legal purposes. Focus on your child's well-being with clearer, more organized interactions.

**Highlights:** AI Communication Referee, Built-In Communication Coaching, Structured Co-Parenting Messaging, Custody Schedule Coordination, Verifiable Communication Records, Conflict Reduction Tools

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Monthly Subscription | $9.99 | per month |


### 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


## Frequently asked questions

### Is Calmr CoParent free?

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

### Is Sync Hemispheres free?

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

### Which has better reviews, Calmr CoParent or Sync Hemispheres?

Calmr CoParent and Sync Hemispheres are both rated 5.0 out of 5 on the App Store, from 5 and 3 ratings respectively.

### Do Calmr CoParent or Sync Hemispheres have ads?

Neither Calmr CoParent nor Sync Hemispheres shows ads.

### Which is updated more often, Calmr CoParent or Sync Hemispheres?

Calmr CoParent ships an update every 9 days, and Sync Hemispheres weekly. Most recently, Calmr CoParent was updated on September 9, 2026 and Sync Hemispheres on September 18, 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.*