Comparison

Optimal HRV vs CalmPulse リラックスチェック

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

Head to head
About

Optimal HRV

This app uses heart rate variability (HRV) and biofeedback to help you manage stress and improve your body's ability to calm down. It offers guided sessions, personalized breathing rhythms, and real-time feedback to train your nervous system for better stress resilience.

Highlights
  • Real-time HRV data and biofeedback
  • Personalized breathing rhythm identification
  • Guided mindfulness sessions
  • Daily check-ins and progress tracking
  • External sensor integration for accuracy
  • Multi-language support
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

CalmPulse リラックスチェック

Features
Read full description

Here is the English version of your app description, optimized for clarity and a professional yet calming tone. --- ## **Key Features** * **Quick 20-Second Measurement:** Get results in moments. * **Heart Rate (BPM) Display:** Real-time pulse monitoring. * **Signal Stability Index:** Visual indicator of measurement quality. * **Condition Score (0–100):** A simple metric to understand your current state. * **Measurement History:** Save and review your past data at any time. * **HealthKit Integration:** Optional syncing with Apple Health. * **Ambient Sound:** Toggle relaxing background audio during measurements. ## **Recommended For** * **Daily Self-Checks:** Perfect for monitoring yourself every morning or before bed. * **Mindfulness & Focus:** Check your state before and after work or study breaks. * **Tracking Progress:** Visualize how your body responds to breathing exercises or rest. ## **Privacy & Security** * **On-Device Processing:** All measurement data is processed directly on your device. * **No Visuals Stored:** We do not save or upload any videos or photos of your face. * **Data Only:** Only the resulting numerical data is saved for your history. ## **Disclaimer** **CalmPulse is not a medical device.** The information provided is for general wellness purposes only and should not be used for the diagnosis, treatment, or prevention of any medical condition. Always consult a healthcare professional for medical advice.

Screenshots

Optimal HRV4 screens
CalmPulse リラックスチェック3 screens

Verdict

The call

The clearest difference is in-app purchases: CalmPulse リラックスチェック at none against Optimal HRV's 3. CalmPulse リラックスチェック also leads on update cadence (every 2 days vs fortnightly). Optimal HRV's advantage is iOS requirement (15.0 vs 17.0). On price, 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. CalmPulse リラックスチェック asks for nothing beyond the download.

UpkeepUpdate frequency

Optimal HRV ships an update fortnightly, CalmPulse リラックスチェック every 2 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Optimal HRV versus CalmPulse リラックスチェック: the parameters behind the verdict, then further details
ParameterOptimal HRVCalmPulse リラックスチェック
PriceFreeFree
Rating3.0 (24 ratings) — better—
Positive reviews16.7% of reviews—
Number of ratings24 — better—
Update frequencyFortnightlyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size57 MB15 MB
Age rating4+4+
DeveloperOptimal, LLCXEROGRAPHIX

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

CalmPulse リラックスチェック

No in-app purchases

Questions

Is Optimal HRV free?
Optimal HRV is free to download, with in-app purchases available.
Is CalmPulse リラックスチェック free?
CalmPulse リラックスチェック is free to download, with no in-app purchases.
Do Optimal HRV or CalmPulse リラックスチェック have ads?
Neither Optimal HRV nor CalmPulse リラックスチェック shows ads.
Which is updated more often, Optimal HRV or CalmPulse リラックスチェック?
Optimal HRV ships an update fortnightly, and CalmPulse リラックスチェック every 2 days. Most recently, Optimal HRV was updated on October 29, 2026 and CalmPulse リラックスチェック on October 25, 2026.

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