Plena Biofeedback

mindfulness meets biometrics

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Real-time biometric feedback for mindfulness. Track heart rate, HRV, and breathing live with Apple Watch — see how your body responds, session by session. 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

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What's New - Apple Watch sync reliability — Sessions sync to iPhone even when the app was in the background. Late-arriving data merges into your session automatically. - Subscription syncs to Watch — Your premium status is recognized on Apple Watch immediately, including after reinstalling or first-time Watch app install. - Done button syncs — Pressing Done on either device dismisses the summary on both. - Redesigned onboarding — Fresh first-launch experience with custom visuals and Watch install guidance. - Fixed sleep data — Sleep charts now show accurate hours by filtering actual sleep stages. No more inflated bars or missing data. - Data page stability — Charts no longer disappear after switching apps. - Improved consistency chart — Clearer legend explaining bar height and zone colors. - Restore Purchases accessible from all purchase screens. - Bug fixes — Duration averages, sync timeouts, and session summary stability.

Version 2.1

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

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Kenneth Nygren
Size
  • 19.1 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.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
  • Plena Premium (Monthly) $9.99
  • Premium Annual $59.99
  • Learn More
Copyright
  • © 2026 Plenitudo.ai
  • Developer Website
  • Privacy Policy

    • More by Kenneth Nygren