# Cardia Sleep — Heart Rate Dipping,Sleep Score

> Heart Rate Dipping,Sleep Score (iPhone/iPad app by Tuong Nguyen.)

- Source: https://appshunter.io/ios/app/cardia-sleep/id6759352829 (this page in markdown: same URL + `.md`)
- Developer: [Tuong Nguyen](https://appshunter.io/developer/1878188325)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-02-25
- Data updated: 2026-06-23
- User reviews in markdown: https://appshunter.io/ios/app/cardia-sleep/id6759352829/reviews.md

## What is Cardia Sleep?

See What Your Heart Does in the Dark.

Cardia Sleep is the only consumer sleep app focused on hemodynamic analysis — tracking how your heart rate dips during sleep, a clinically significant indicator of cardiovascular health that no other app surfaces.

WHAT MAKES CARDIA SLEEP DIFFERENT
While other sleep apps focus on wake-up alarms and generic quality scores, Cardia Sleep analyzes your nocturnal heart rate dipping pattern — the measurement cardiologists use to identify "Non-Dipping Hypertension," a condition linked to increased cardiovascular risk.

YOUR NIGHTLY DIP DASHBOARD
• Dip Percentage — how much your heart rate drops from day to night
• Color-coded status — Dipper (healthy), Non-Dipper (at risk), or Reverse Dipper (critical)
• Trend tracking — see if your dipping pattern is improving or worsening over time

SLEEP SCORE (0–100)
A composite score weighted across four clinical dimensions:
• Duration — are you sleeping enough?
• Deep Sleep — are you getting restorative sleep?
• Heart Rate Dipping — is your cardiovascular system recovering?
• HRV — is your nervous system properly resetting?

SMART FEATURES
• Morning Debrief — daily AI-powered summary of last night's sleep
• Sleep Debt Tracker — know exactly how many hours you owe your body
• 8 Achievement Badges — gamified milestones to build healthy habits
• 14-Night Streak Tracking — consistency is key
• Bedtime Reminders & Smart Notifications

PRO FEATURES
• Doctor-Ready PDF Reports — share your 30-day dipping trend with your healthcare provider
• AI-Powered Insights (Ask Cardia) — get personalized answers about your sleep data
• Unlimited Session History — see all your data, not just the last 7 days
• Non-Dipper Streak Alerts — get notified after 3+ consecutive at-risk nights
• Advanced Weekly Analytics — duration charts, stage breakdowns, HRV trends
• Pro Achievement Badges
PART OF THE CARDIA ECOSYSTEM
Cardia Sleep works alongside Cardia Steps, Meds, Care, and more — connecting your sleep data to your broader health picture through a shared data layer.

PRIVACY FIRST
All your health data stays on your device. No accounts required. No third-party analytics. No cloud uploads. Your sleep data is yours.
Requires Apple Watch for heart rate data during sleep.
Not a medical device. For trend tracking and informational purposes only. Consult your healthcare provider for medical decisions.

Terms of Use (EULA): https://keendigital.co/#/terms
Privacy Policy: https://keendigital.co/#/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Cardia Sleep Pro | $14.99 | per year |



## Version history (last 1 release)

### 1.0.0 — 2026-02-25

No release notes.

## More apps by Tuong Nguyen

- [Cardia Fast](https://appshunter.io/ios/app/cardia-fast/id6759427127)

All apps by Tuong Nguyen: https://appshunter.io/developer/1878188325

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-23.*