HRV Sync vs CalmMate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- One-tap HRV data sync to Health app
- View HRV history and trends
- Secure OAuth login
- Custom date range import
- Privacy-focused data handling
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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.
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.
- 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
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | HRV Sync | CalmMate |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 12+ |
| Developer | Marcin Naglik | Mohanaraman Namasivayam |
Customer experience
HRV Sync
CalmMate
In-app purchases
HRV Sync
No in-app purchases
CalmMate
No in-app purchases









