Comparison

Optimal HRV vs Absolute Rest

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

Head to head
About

Optimal HRV

Monitor, analyze, and improve your Heart Rate Variability (HRV) scores. This app offers personalized training, biofeedback, and stress-reducing activities to enhance health, reduce stress, and improve mental clarity.

Highlights
  • Real-time HRV monitoring
  • Personalized training plans
  • Guided meditation and breathing exercises
  • Comprehensive data analysis
  • Stress response insights
  • Biofeedback optimization
Features
Read full description

Are you feeling stressed, burned out, or just not yourself? Optimal HRV is the guided biofeedback app that teaches your body to calm down — for real. Backed by a Harvard Medical School mindfulness expert and trusted by athletes worldwide. Optimal HRV pairs real HRV data with live biofeedback, so every session trains your nervous system to handle stress better — not just tells you that you're stressed. Why HRV and Biofeedback Training Work Your Heart Rate Variability (HRV) is a window into how well your body handles stress, anxiety, and recovery — and biofeedback is how you train it to improve. Together, they show you what's happening inside your body, then guide you to change it in real time. With Optimal HRV, you can: • See how stressed — or relaxed — your body really is, using real HRV data. • Learn what actually helps you recover, from sleep to workouts to busy workdays. • Use live biofeedback to train your body to relax faster, right as it's happening. • Discover your own personal "perfect breathing rhythm" through guided sessions. Features You'll Actually Use • Daily Check-Ins — take a quick reading each morning, or anytime you want to see how you're doing. • Your Perfect Breathing Rhythm — a simple test finds the exact breathing pace that works best for you. • Live Feedback While You Train — a simple on-screen guide shows you when you're doing it just right. • Calming Mindfulness Sessions — guided practices created with a Harvard Medical School mindfulness expert, covering stress, anxiety, pain management, athletic performance, and more, with calming narrations in your choice of voice. • Easy-to-Read Progress — see your trends over days, weeks, and months, no data expertise needed. • Video Tutorials — learn HRV concepts and techniques at your own pace. • Make It Yours — adjust sounds, pacing, and reminders so training fits your life. • Available in 14 Languages — use Optimal HRV in your native language. • Device Testing — quickly verify if your heart rate monitor works with the app. • Great for Teams Too — employers and coaches can track group wellness together (Dashboard access needed). Why Optimal HRV Works with External Sensors (Not Apple Watch) We choose precision over convenience. Apple Watch is great for daily wellness, but Optimal HRV is built for serious HRV training. That's why we connect directly to an HRV monitor via Bluetooth — they deliver millisecond-accurate R‑R intervals that wrist sensors can't match. What that means for you: • More accurate data – better insights, better decisions. • Real-time streaming – no gaps, no guesswork. • Reliable results – trusted by athletes and coaches worldwide. Love Optimal HRV? Leave a review and help others find their calm. Your feedback helps us improve and reaches more people who need stress relief. Try it free for 30 days and feel the difference for yourself. Download now and start training your nervous system today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Absolute Rest

This app provides a comprehensive sleep management program using an FDA-cleared testing system to analyze sleep patterns through the autonomic nervous system. It offers personalized insights and expert support to improve sleep quality and daytime performance.

Highlights
  • Comprehensive sleep assessment
  • Autonomic nervous system testing
  • Personalized insights and expert support
  • User-friendly app interface
  • Continuous monitoring of sleep parameters
Read full description

Transform Your Sleep with Clinical Precision Absolute Rest combines the capabilities of a professional sleep laboratory with the precision of sleep science to deliver the first and only comprehensive sleep management program directly to your home. Utilizing an innovative FDA-cleared testing system, designed to detect sleep patterns through the autonomic nervous system with cutting-edge technology, you'll get a comprehensive analysis of your sleep quality and personalized insights to help you achieve your best rest. Key Features: Comprehensive Sleep Assessment: Absolute Rest transforms your fingertip into a clinical sleep lab, measuring every movement, heartbeat, and breath throughout the night. Detect and analyze a wide range of sleep problems and disorders, including insomnia, sleep apnea, hyperarousal, hyperactivity, and much more with unmatched depth and clarity. Cutting-Edge Autonomic Nervous System Testing: Gain insights from your autonomic nervous system while you sleep, with precise measurements of sympathetic fragmentation, deep parasympathetic restoration, sleep-disordered breathing including apneas, hypopneas, and RERAs, the only objective and FDA cleared sleep quality index (SQI), and much more. Personalized Insights and Expert Support: Receive detailed, actionable recommendations based on your unique sleep data. Your dedicated team, including a sleep clinician, clinical psychologist, and behavioral sleep expert, tailors solutions to your specific needs. Your team actively monitors nightly data to provide real-time, personalized guidance and comprehensive management to improve your sleep health and daytime performance. User-Friendly App Interface: The Absolute Rest app makes it simple to track meaningful sleep metrics and understand your unique patterns and trends with intuitive visuals and reports available on our companion web app. Continuous Monitoring: Unlike laboratory-based sleep studies, Absolute Rest continuously monitors multiple sleep parameters over time, providing ongoing insights and adjustments to help you optimize your sleep, and energize your life. Why Choose Absolute Rest? Millions suffer from poor sleep quality, leading to fragmented sleep, fatigue, and many associated health issues. Absolute Rest goes beyond traditional sleep trackers, offering a comprehensive, clinical-grade assessment to help you uncover the root causes of your particular sleep problems. With personalized insights and expert support, you can finally achieve the deep, restorative sleep you need to perform your best every day.

Screenshots

Optimal HRV4 screens
Absolute Rest3 screens

Verdict

The call

The clearest difference is rating: Absolute Rest at 3.7 against Optimal HRV's 3.0. Absolute Rest also leads on in-app purchases (none vs 3). Optimal HRV's advantage is ratings volume (24 vs 3) and iOS requirement (13.0 vs 16.0). On price, update cadence, ads 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. Optimal HRV sells 3 in-app purchases, starting at $9.99 per month. Absolute Rest asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Absolute Rest holds the better App Store score, 3.7 against 3.0. That said, the two scores are not equally well evidenced: Optimal HRV has 24 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Optimal HRV ships an update fortnightly, Absolute Rest every 3 weeks. The most recent releases landed on September 21, 2026 and July 31, 2026 respectively.

Scorecard5 real differences · 5 level
Optimal HRV versus Absolute Rest: the parameters behind the verdict, then further details
ParameterOptimal HRVAbsolute Rest
PriceFreeFree
Rating3.0 (24 ratings)3.7 (3 ratings) — better
Positive reviews16.7% of reviews—
Number of ratings24 — better3
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size52 MB41 MB
Age rating4+4+
DeveloperOptimal, LLCAbsolute Rest, Inc

Customer experience

Optimal HRV

All ratings24 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews12 reviews
Positive16.7%
Neutral0.0%
Negative83.3%

Absolute Rest

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

3 purchases

Optimal HRV

Subscriptions3
  • 1 month1 Month trial$9.991 Month
  • 6 Month1 Month trial$47.996 Months
  • One Year1 Month trial$59.991 Year
None

Absolute Rest

No in-app purchases

Questions

Is Optimal HRV free?
Optimal HRV is free to download, with in-app purchases available.
Is Absolute Rest free?
Absolute Rest is free to download, with no in-app purchases.
Which has better reviews, Optimal HRV or Absolute Rest?
Absolute Rest is rated higher. Optimal HRV averages 3.0 out of 5 from 24 ratings, while Absolute Rest averages 3.7 from 3 ratings.
Do Optimal HRV or Absolute Rest have ads?
Neither Optimal HRV nor Absolute Rest shows ads.
Which is updated more often, Optimal HRV or Absolute Rest?
Optimal HRV ships an update fortnightly, and Absolute Rest every 3 weeks. Most recently, Optimal HRV was updated on September 21, 2026 and Absolute Rest on July 31, 2026.

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