Comparison

HRV Sync vs LetGo

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

LetGo

Features
Read full description

LetGo helps you quit unhelpful habits and build better routines without all-or-nothing pressure. Most habit trackers make one missed day feel like failure. LetGo is more than a tracker: it's a calmer, more supportive way to change. Adaptive Habits creates realistic weekly goals that adjust to you, your progress and pace, helping you keep moving forward when life gets messy. No guilt. No starting over. Whether you want to reduce smoking, drink less alcohol, spend less time scrolling, exercise regularly, read more, meditate, sleep better, or drink more water, LetGo gives you a clear, supportive plan for lasting change - one that adapts when life does not go as planned. Building habits with LetGo feels less like using another productivity tool and more like an evolving journey you actually enjoy showing up for. Our Balloon and Stone metaphor makes progress feel visible: build good habits that lift you up, and let go of the habits that hold you down. This isn't just another checklist, it’s an evidence-based approach to lifestyle and habit design. KEY FEATURES • Adaptive Habits: Set a pace that feels achievable. Your weekly goals adapt to your successes and struggles, helping you build consistency without burnout. • Pressure-free progress: Built on principles of behavioral psychology and the science of "small wins." Slip-ups happen. Instead of killing your streak, LetGo recalibrates your path to keep you moving forward.| • Quit & Build: Work simultaneously on leaving behind habits that hold you back while building routines that support the person you want to become. • Cloud Sync & Security: Never lose your progress. Your data is automatically saved to the cloud, keeping your progress safe and available across your devices. • Insights and statistics: Understand your consistency, spot patterns, and see how your habits change over time. • Gentle reminders: Stay mindful of your plan with reminders designed to help you return to your habits at the right moment. • Unique and simple design: We’ve stripped away the clutter. Enjoy a clean, intuitive interface designed to reduce cognitive load, so you can focus entirely on your habits, not the UI. • Dark & Light modes: Whether you’re setting goals at dawn or reflecting at midnight, our beautiful Dark and Light modes ensure a comfortable experience for your eyes at any time of day. Upgrade to LetGo UNLIMITED to get: • Unlimited amount of Adaptive Habits: Track as many habits as you need, without any limits. • Detailed Analytics: Get insightful data visualizations and unlock all of advanced statistics. • Access to premium features Available as a monthly or annual subscription, with a Lifetime purchase option. SUBSCRIPTION INFORMATION: LetGo Premium subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your App Store account settings after purchase. Terms of Use: https://www.letgo.selfup.app/terms-of-service Privacy Policy: https://www.letgo.selfup.app/privacy-policy LetGo is a wellness tool for habit change and is not a substitute for professional medical advice, diagnosis, or treatment.

Screenshots

HRV Sync4 screens
LetGo4 screens

Verdict

The call

The clearest difference is in-app purchases: HRV Sync at none against LetGo's 6. LetGo's advantage is update cadence (every 10 days vs every 2 months) and device support (3 vs 1). On price and ads 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. LetGo sells 5 in-app purchases, starting at $1.99 per month. HRV Sync asks for nothing beyond the download.

UpkeepUpdate frequency

HRV Sync ships an update every 2 months, LetGo every 10 days. Both last shipped on October 7, 2026.

Scorecard4 real differences · 6 level
HRV Sync versus LetGo: the parameters behind the verdict, then further details
ParameterHRV SyncLetGo
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size1 MB68 MB
Age rating4+17+
DeveloperMarcin NaglikKRZYSZTOF PASZKOWSKI

In-app purchases

None

HRV Sync

No in-app purchases

5 purchases

LetGo

Subscriptions4
  • LetGo: Unlimited Monthly + 7d-Trial7 Days trial$1.991 Month
  • LetGo: Unlimited Monthly$1.991 Month
  • LetGo: Unlimited Annual + 7d-Trial7 Days trial$19.991 Year
Show 1 more
  • LetGo: Unlimited Annual$19.991 Year
One-time1
  • LetGo: Unlimited Lifetime2 variants$24.99

Questions

Is HRV Sync free?
HRV Sync is free to download, with no in-app purchases.
Is LetGo free?
LetGo is free to download, with in-app purchases available.
Do HRV Sync or LetGo have ads?
Neither HRV Sync nor LetGo shows ads.
Which is updated more often, HRV Sync or LetGo?
HRV Sync ships an update every 2 months, and LetGo every 10 days. Most recently, HRV Sync was updated on October 7, 2026 and LetGo on October 7, 2026.

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