Comparison

Biofeedback App vs Plena Biofeedback

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Biofeedback App

This app explores the combination of biofeedback and mental rehearsal to improve athletic performance. It incorporates conscious breathing, heart rate, and body temperature tracking, alongside mental rehearsal and lucid dreaming techniques. The goal is to enhance training and competition outcomes over time.

Highlights
  • Biofeedback tracking
  • Mental rehearsal techniques
  • Lucid dreaming integration
  • Conscious breathing exercises
  • Heart rate monitoring
  • Body temperature tracking
Read full description

Can combined biofeedback and mental rehearsal enhance sport performance? This app is an attempt to articulate both this question and the potential responses while including conscious breathing, heart rate, body temperate (both biofeedback mechanisms), mental rehearsal and lucid dreaming, an extension of mental rehearsal but in an alpha and theta brain wave state. The athlete can use this app to track each of these 5 which overtime should help enhance both the training and then the competition and performance.

About

Plena Biofeedback

Features
Read full description

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/

Screenshots

Biofeedback App4 screens
Plena Biofeedback4 screens

Verdict

The call

The clearest difference is in-app purchases: Biofeedback App at none against Plena Biofeedback's 2. Biofeedback App also leads on update cadence (every 2 weeks vs every 6 weeks) and iOS requirement (9.0 vs 17.6). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Plena Biofeedback sells 2 in-app purchases, starting at $9.99 per month. Biofeedback App asks for nothing beyond the download.

UpkeepUpdate frequency

Biofeedback App ships an update every 2 weeks, Plena Biofeedback every 6 weeks. The most recent releases landed on September 14, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Biofeedback App versus Plena Biofeedback: the parameters behind the verdict, then further details
ParameterBiofeedback AppPlena Biofeedback
PriceFreeFree
Rating1.7 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS9.0 — better17.6
Further details — not scored
Size37 MB19 MB
Age rating4+4+
DeveloperMobile Associates, LLCKenneth Nygren

In-app purchases

None

Biofeedback App

No in-app purchases

2 purchases

Plena Biofeedback

Subscriptions2
  • Plena Premium (Monthly)$9.991 Month
  • Premium Annual$59.991 Year

Questions

Is Biofeedback App free?
Biofeedback App is free to download, with no in-app purchases.
Is Plena Biofeedback free?
Plena Biofeedback is free to download, with in-app purchases available.
Do Biofeedback App or Plena Biofeedback have ads?
Neither Biofeedback App nor Plena Biofeedback shows ads.
Which is updated more often, Biofeedback App or Plena Biofeedback?
Biofeedback App ships an update every 2 weeks, and Plena Biofeedback every 6 weeks. Most recently, Biofeedback App was updated on September 14, 2026 and Plena Biofeedback on October 1, 2026.

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