Comparison

NuCalm vs Sensor Bio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NuCalm

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
Read full description

Powered by neuroscience and made for real life. A drug-free solution for sleep, stress, focus, and energy. You do everything right, but your mind never stops. You give your best at work, show up for everyone you love, and still lie awake with thoughts that won’t quiet down. The world expects you to keep going, but NuCalm helps you finally slow down. Built on 35 years of neuroscience, NuCalm is the world’s only patented and clinically proven sleep and stress relief app that helps you relax, sleep better, focus deeply, and recharge naturally, all without drugs or supplements. Trusted by doctors, pilots, athletes, the U.S. military, and the FBI, NuCalm has helped millions experience immediate stress relief, deeper sleep, sustainable energy, and sharper focus by restoring balance to their nervous system. Feeling good, made easy. At home, at work, and everywhere in between, NuCalm meets you where stress shows up. By gently guiding your brain and body into balance, NuCalm helps you calm anxiety naturally, recover from exhaustion, and feel fully rested. Proven by science. Trusted by professionals. With over 2 billion minutes of NuCalm played worldwide, NuCalm’s neuroscience-backed relaxation technology has been relied on by healthcare professionals, high performers, and women everywhere seeking real calm, better sleep, and lasting focus. With six specialized experiences in one easy-to-use mobile app, you can choose what your body needs throughout your day: DeepSleep – fall asleep faster, sleep deeper, and wake up refreshed Rescue – lower stress and calm anxiety in minutes PowerNap – reset and recharge your energy mid-day FlowState – tap into your creative genius effortlessly Focus – sharpen concentration and boost productivity Ignite – elevate your energy naturally to get into a peak state without caffeine Whether you’re managing a household, building a business, or balancing both, NuCalm helps you show up with more clarity, patience, and confidence. It’s your daily nervous system reset, a self-care ritual that fits into real life. Clinically proven benefits include: • Reduce stress within minutes • Improve sleep quality and recovery • Lower inflammation and increase resilience • Improve metabolic health • Boost focus and creativity • Restore balance to the mind and body Start your free trial today and feel the difference after your first session. Your nervous system deserves more than survival mode. Find calm, focus, and real restoration with NuCalm, the world’s best wellness app powered by neuroscience.

About

Sensor Bio

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
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Sensor Bio is a biosensor-based remote monitoring platform. FEATURES • Validated clinical-grade biometrics include heart rate, heart rate variability (HRV), respiratory rate, and more. • Critically acclaimed sleep tracking. Sleep stages (awake, light, deep, REM), biometrics (HR, HRV, resp. rate), arm movement, and more! • Remote monitoring functionality to help organizations to monitor biometrics and user adherence effortlessly. • Personalized Insights tailored for each individual. • and more! CONNECT WITH US Online - https://sensorbio.com Read more about our terms of use here: https://sensorbio.com/terms-conditions/ Read more about our privacy policy here: https://sensorbio.com/privacy-center/ Disclaimers: Sensor Bio wearables are not medical devices and are meant only for general fitness/wellness purposes. Statements made in the Sensor Bio app are not medical advice. Consult with a doctor before making any medical decisions using data collected using the Sensor Bio platform.

Screenshots

NuCalm4 screens
Sensor Bio4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
NuCalm versus Sensor Bio: the parameters behind the verdict, then further details
ParameterNuCalmSensor Bio
PriceFreeFree
Rating4.0 (363 ratings)5.0 (10 ratings) — better
Positive reviews64.9% of reviews—
Number of ratings363 — better10
Update frequencyEvery 5 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size118 MB166 MB
Age rating9+4+
DeveloperSolace Lifesciences, IncSensr Biotech, LLC

Customer experience

NuCalm

All ratings348 ratings
Positive74.1%
Neutral3.2%
Negative22.7%
Written reviews239 reviews
Positive64.9%
Neutral3.3%
Negative31.8%

Sensor Bio

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

NuCalm

Reported bugs

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

Requested features

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

Sensor Bio

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

NuCalm

No in-app purchases

None

Sensor Bio

No in-app purchases

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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