# NuCalm vs Marrowbone

The clearest difference is in-app purchases: NuCalm at none against Marrowbone's 2. Marrowbone's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Marrowbone sells 2 in-app purchases, starting at $4.99 per month. NuCalm asks for nothing beyond the download.

NuCalm ships an update every 5 weeks, Marrowbone every 2 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | NuCalm | Marrowbone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (364 ratings)](https://appshunter.io/ios/app/nucalmsleep-recover-perform/id1126899503/reviews)** | — |
| Number of ratings | **364** | — |
| Positive reviews | 64.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 118 MB | 127 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Solace Lifesciences, Inc](https://appshunter.io/developer/1126899502) | [Marrowbone Technologies Ltd](https://appshunter.io/developer/6781233702) |

## What reviewers say

### NuCalm

[App page](https://appshunter.io/ios/app/nucalmsleep-recover-perform/id1126899503)

This app offers a drug-free solution to manage stress, improve sleep, enhance focus, and boost energy. It utilizes neuroscience-backed technology to guide your brain and body into balance, promoting natural relaxation and recovery. Experience immediate stress relief and a restored nervous system.

**Highlights:** Drug-free sleep improvement, Stress and anxiety relief, Enhanced focus and productivity, Natural energy boost, Nervous system balance, Clinically proven benefits

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Life-changing benefits
- 🌟 Profound impact on sleep, stress, and focus
- 👍 Effective for managing anxiety and PTSD
- ⭐ Transformative and game-changing
- 🤩 Fantastic product that works as advertised

**What reviewers complain about**

- 🐛 Buggy and unreliable app
- 💰 Extremely expensive subscription model
- 🤯 Frustrating customer service and account issues
- 🔍 Lack of transparency around scientific claims
- 🤔 Inconsistent performance and functionality

**Reported bugs**

- App crashes and freezes frequently
- Difficulty logging in and accessing accounts
- Tracks failing to download or play properly
- Subscription and billing issues

**Requested features**

- More customization options for audio tracks
- Offline mode for downloading tracks
- Improved app stability and user experience
- Better customer support and communication


### Marrowbone

[App page](https://appshunter.io/ios/app/marrowbone/id6781233700)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marrowbone Plus Monthly | $4.99 | per month |
| Marrowbone Plus Annual | $49.99 | per year |


## Frequently asked questions

### Is NuCalm free?

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

### Is Marrowbone free?

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

### Do NuCalm or Marrowbone have ads?

Neither NuCalm nor Marrowbone shows ads.

### Which is updated more often, NuCalm or Marrowbone?

NuCalm ships an update every 5 weeks, and Marrowbone every 2 weeks. Most recently, NuCalm was updated on November 11, 2026 and Marrowbone on November 5, 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.*