Plena Biofeedback

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/