Plena Biofeedback
mindfulness meets biometrics
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Try Premium free for 7 days with the annual plan. Recovery insights from your own overnight data — and your health data never leaves your device.
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 has not received enough ratings or reviews to display an overview.
• Try Premium free for 7 days with the annual plan
• Your daily HRV now comes from overnight and resting readings in Apple Health — wear your Watch to sleep for the clearest picture. Every reading shows where it came from, like "Last night" or "Earlier today"
• More accurate sleep durations when both iPhone and Apple Watch track the same night
• Longer Apple Watch battery life after sessions
• Privacy hardening: biometric values never appear in system logs
Your health data never leaves your device.
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
- Provider
- Kenneth Nygren
- Size
- 19.8 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) USD 11.99
- Premium Annual USD 69.99
- Copyright
- © 2026 Plenitudo.ai