Plena Biofeedback
mindfulness meets biometrics
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Plena: The Only Mindfulness App with Stress Zones, Intentions, and Readiness Scores
Start mindfulness sessions from your Apple Watch with live sensor streaming to iPhone. Set an intention before each session, see real-time stress zone classification as you practice, then reflect afterward. Track daily readiness with a score showing exactly which metrics help or hinder recovery.
What Makes Plena Different
- WATCH-FIRST: Start from Apple Watch with live data streaming to iPhone
- STRESS ZONES: See Calm/Optimal/Elevated zones update in real-time
- INTENTIONS + REFLECTIONS: Set goals before, record insights after
- READINESS BREAKDOWN: Daily score with metric contributions explained
- MIND-BREATH-BODY: Built on the triangle of HR, HRV, and respiration
- PRIVACY-FIRST: Health data stays on your device, never shared
The Triangle: Mind, Breath, Body
The triangle represents the three core rhythms of human calm:
- Heart Rate reflects moment-to-moment activity
- HRV shows adaptability and stress balance
- Breath regulates the entire system
When in harmony, they create balance. That's what Plena measures in real time.
Real-Time Stress Zone Classification
Color-coded zones during sessions:
- Calm Zone - Relaxed, low-stress state
- Optimal Zone - Balanced, functioning well
- Elevated Zone - Higher stress response
Key Features
Biometric Tracking
- Heart Rate, HRV/SDNN, Respiratory Rate
- Body Temperature, VO2 Max
Apple Watch Integration
- Start sessions directly from Watch
- Live sensor sync to iPhone
- Zone indicators on wrist
- Works independently from iPhone
Dashboard and Analytics
- Session statistics, streaks, trends
- Interactive graphs (Day/Week/Month/Year)
- HRV insights and pattern recognition
Session Flow
- Pre-session intention setting
- Post-session reflections
- Automatic saving and summaries
Readiness Score
Daily score (0-100) combining Resting HR, HRV Balance, Temperature, Recovery, and Sleep. View contributor breakdowns and compare to yesterday.
Privacy
All data stored locally using Apple's HealthKit. No third-party sharing.
Requirements
- iOS 17.0+, Apple Watch Series 4+ (optional)
- HealthKit permissions required
Medical Disclaimer
Plena is not a medical device and does not provide medical advice. Readings are for wellness purposes only. Consult healthcare professionals for medical advice.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved reliability and Watch sync.
IMPROVEMENTS:
- Watch sessions now reliably sync to iPhone even when backgrounded
- Fixed duplicate sessions appearing in Dashboard
- Improved session data persistence during background sync
- Enhanced sync reliability between Apple Watch and iPhone
- Better handling of sessions started on Apple Watch
Bug fixes and stability improvements.
Thank you for using Plena!
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
The developer, Kenneth Nygren, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kenneth Nygren
- Size
- 19.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Watch
Requires watchOS 10.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Plena Premium (Monthly) $9.99
- Premium Annual $59.99
- Copyright
- © 2026 Plenitudo.ai