Plena Biofeedback vs LensCal

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/

LensCal turns a photo of your meal into calories and macronutrients. IT READS WHAT IS ALREADY WRITTEN Before estimating anything, LensCal looks for the exact data. If there is a barcode, it identifies the product. If there is a nutrition label, it transcribes it. Both happen inside your iPhone, offline, without the photo ever leaving the device. FOOD BY FOOD A plate is not a single number. With LensCal Premium, every component — the chicken, the rice, the dressing — is identified and weighed separately, and the total is their sum. Correct the grams of any item and the total recalculates instantly: you are the one looking at the plate. HONEST ABOUT WHAT IT KNOWS LensCal distinguishes a measured value from an estimate, and says which is which. If the photo is dark or blurry it tells you, instead of handing you a number with false confidence. WITHOUT PHOTOS TOO Manual entry, food search, favourites and recents. Water tracking with a Home Screen widget. Streaks, so the habit sticks. YOUR DATA IS YOURS No accounts, no sign-up, no advertising and no tracking. Your profile and your history stay on the device. Optional Apple Health integration. LENSCAL PREMIUM An auto-renewable subscription that adds the precision AI analysis, full history and extended statistics. - LensCal Premium Yearly: 29.99 USD per year, with a 7-day free trial for new subscribers - LensCal Premium Monthly: 6.99 USD per month Prices are in U.S. dollars; your local price is shown in the app before you buy. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically for the same period and price unless you cancel it at least 24 hours before the end of the current period, and your account is charged within the 24 hours before each renewal. You can manage or cancel your subscription in your Apple Account settings. Any unused part of a free trial is forfeited when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lens-cal.vercel.app/privacy.html LensCal provides estimates for information only. It is not a medical device and does not replace the advice of a healthcare professional.