Comparison

HRV Sync vs CalmMate

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

Head to head
About

HRV Sync

Effortlessly sync your Heart Rate Variability (HRV) data to the iOS Health app. Connect your fitness account to view HRV trends alongside other health metrics. Prioritizes user privacy with secure token-based login and no data collection.

Highlights
  • One-tap HRV data sync to Health app
  • View HRV history and trends
  • Secure OAuth login
  • Custom date range import
  • Privacy-focused data handling
Features
Read full description

Track your Heart Rate Variability trends by syncing HRV data to the iOS Health app. HRV Sync connects to your fitness account and imports your daily HRV measurements, making them available alongside all your other health metrics in one place. FEATURES • One-tap sync of HRV data to the Health app • View your HRV history and trends • Secure OAuth login — your password is never stored • Choose custom date ranges to import HOW IT WORKS 1. Log in to your fitness tracker account 2. Select the date range to sync 3. Tap Sync — your HRV data appears in the Health app PRIVACY FIRST • Your credentials are never stored — only secure tokens • Data syncs directly to your device • No data is collected or shared with third parties COMPATIBILITY Compatible with Garmin® fitness devices and accounts. --- This app is an independent product and is not affiliated with, endorsed by, or sponsored by Garmin Ltd. or its subsidiaries. Garmin® is a registered trademark of Garmin Ltd.

About

CalmMate

This app provides immediate support for panic attacks with a one-tap breathing guide and evidence-informed techniques. It also offers daily tools like a meditation timer, journal, and mood tracking to help manage anxiety and promote well-being.

Highlights
  • One-tap panic guide
  • 9 evidence-informed breathing techniques
  • 5-4-3-2-1 sensory grounding
  • Trusted contacts integration
  • Meditation timer with on-device soundscapes
  • Gentle journal with mood trends
  • Apple Watch app with haptic guidance
Features
Read full description

When panic hits, you don't need a wellness platform. You need one button. CalmMate is a pocket panic-support companion built around a single promise: relief starts in 60 seconds, and the core tools are never behind a login, a paywall, or an internet connection. IN THE MOMENT • One-tap Panic Guide — a steady 4-4-6-2 breathing circle with calm prompts, gentle chimes, and haptic pulses that carry the rhythm even with your eyes closed • 9 evidence-informed breathing techniques: Extended Exhale, Physiological Sigh, Box Breathing, 4-7-8, Coherent Breathing, Bhramari humming, alternate-nostril, and more — each with exact timings and cautions • 5-4-3-2-1 sensory grounding that walks you back into the room, one checked item at a time • Trusted contacts: call or text your person straight from the session screen EVERY DAY • Meditation timer with synthesized rain, ocean, brown noise, and fire — generated on-device, zero downloads, works in airplane mode • A gentle journal with 60 rotating prompts and a mood trend that shows whether the breathing is actually helping • The Impact Bank: every minute of regulation stays counted, forever. No streaks to break. Progress, never pressure. • Energy slider that meets you where you are — frozen and numb gets a different reset than racing and wired ON YOUR WRIST • Full Apple Watch app: haptic-guided breathing that works wrist-down, one-tap panic mode, grounding, and a meditation timer MADE FOR REAL PEOPLE • Adult, Teen, Kids (with parent PIN), and Prenatal modes with age-appropriate guidance • Full dark mode designed for 3 a.m. • Reduce Motion support throughout CalmMate offers self-help breathing and grounding tools. It is not a medical device and is not a substitute for professional mental-health care. If you are in crisis, the app surfaces crisis lines (call or text 988 in the US) on every relevant screen.

Screenshots

HRV Sync4 screens
CalmMate4 screens

Verdict

The call

HRV Sync and CalmMate are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

On the App Store both sit at effectively the same score — 5.0 for HRV Sync against 5.0 for CalmMate. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

ScorecardNo meaningful differences
HRV Sync versus CalmMate: the parameters behind the verdict, then further details
ParameterHRV SyncCalmMate
PriceFreeFree
Rating5.0 (3 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings3 — better2
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS17.017.0
Further details — not scored
Size1 MB2 MB
Age rating4+12+
DeveloperMarcin NaglikMohanaraman Namasivayam

Customer experience

HRV Sync

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CalmMate

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

HRV Sync

No in-app purchases

None

CalmMate

No in-app purchases

Questions

Is HRV Sync free?
HRV Sync is free to download, with no in-app purchases.
Is CalmMate free?
CalmMate is free to download, with no in-app purchases.
Which has better reviews, HRV Sync or CalmMate?
HRV Sync and CalmMate are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.
Do HRV Sync or CalmMate have ads?
Neither HRV Sync nor CalmMate shows ads.

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