# NuCalm vs Sensor Bio

The clearest difference is rating: Sensor Bio at 5.0 against NuCalm's 4.0. Sensor Bio also leads on update cadence (weekly vs every 5 weeks) and monetization model (ad-supported vs free with in-app purchases). NuCalm's advantage is ratings volume (363 vs 10) and iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sensor Bio holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: NuCalm has 363 ratings behind it against 10, so its average is the more settled of the two.

NuCalm ships an update every 5 weeks, Sensor Bio weekly. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | NuCalm | Sensor Bio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (363 ratings)](https://appshunter.io/ios/app/nucalmsleep-recover-perform/id1126899503/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/sensor-bio/id6745620963/reviews)** |
| Number of ratings | **363** | 10 |
| Positive reviews | 64.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 118 MB | 166 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Solace Lifesciences, Inc](https://appshunter.io/developer/1126899502) | [Sensr Biotech, LLC](https://appshunter.io/developer/1812560181) |

## 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


### Sensor Bio

[App page](https://appshunter.io/ios/app/sensor-bio/id6745620963)

This platform uses biosensors to remotely monitor key health metrics like heart rate, HRV, and sleep stages. It provides personalized insights and is designed for general fitness and wellness purposes.

**Highlights:** Clinical-grade biometrics, Validated heart rate and HRV tracking, Detailed sleep stage analysis, Remote monitoring capabilities, Personalized health insights

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

**In-app purchases:** none


## Frequently asked questions

### Is NuCalm free?

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

### Is Sensor Bio free?

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

### Which has better reviews, NuCalm or Sensor Bio?

Sensor Bio is rated higher. NuCalm averages 4.0 out of 5 from 363 ratings, while Sensor Bio averages 5.0 from 10 ratings.

### Do NuCalm or Sensor Bio have ads?

Neither NuCalm nor Sensor Bio shows ads.

### Which is updated more often, NuCalm or Sensor Bio?

NuCalm ships an update every 5 weeks, and Sensor Bio weekly. Most recently, NuCalm was updated on November 1, 2026 and Sensor Bio on October 28, 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.*