HRV4Training vs GroundApp

The first scientifically validated Heart Rate Variability (HRV) app. HRV4Training provides HRV based insights to help you quantify stress, better balance training and lifestyle, and improve performance. HRV4Training does not require a heart rate monitor, since it can accurately assess your HRV using the phone's camera. HRV4Training also works with Apple Watch, the Oura ring and all compatible Bluetooth SMART sensors. HRV4Training is also the first app that goes beyond simple measurements and provides insights on: 1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.) 2) long term multi-parameter trends to look at the big picture 3) correlations between physiological measurements and annotations 4) training load analysis, fitness, fatigue, readiness to perform and injury risk 5) VO2max estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts 6) Training Polarization analysis (or 80/20) 7) Lactate Threshold Estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts 8) Weekly and monthly summaries to track progress. All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance. Supported devices for the camera measurement: iPhones 5, 5S, 6, 6S, 6+, 6S+, SE, 7, 7+, 8, 8+, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, 12 mini, 12, 12 Pro, 12 Pro Max, 13 mini, 13, 13 Pro, 13 Pro Max, 14, 14 Plus, 14 Max, 14 Pro, 15, 15 Max, 15 Pro, 16, 16 Max, 16 Pro Currently unsupported devices for the camera measurement: iPhones 4S, iPads and iPods - These devices require a chest strap. Other features: - HRV-based advice helps you to adapt your trainings based on objective measures of recovery - TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress - Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or simply your phone's Camera - Integrates with the Health app (writes heart rate, and sleep, read sleep time) - Configurable test (single or orthostatic, choose test duration between 1, 3 or 5 minutes) - Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz) - Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a bluetooth SMART sensor - HRV4T Recovery Points to provide a single, straightforward metric to analyze your physical condition - Population summaries and people like you comparisons to put your data into perspective - Analysis of compliance and consistency - Data export via email or Dropbox - Integrates with TrainingPeaks, Oura, Strava and Coros HRV4Training requires to register an account with your email address, so that your data can be backed up safely and retrieved in case anything happens (app issue, changing phone, etc.). HRV4Training does not provide medical advice. It is intended for informational purposes only. Consult a medical professional before making health or lifestyle decisions. Please find an overview of the relevant scientific literature in our guide, here: https://marcoaltini.substack.com/p/the-ultimate-guide-to-heart-rate

Your nervous system already knows how to settle. GroundApp gives it the right breath. Meet Bodie, your breathing companion. Bodie sits in the middle of Home and breathes the rhythm the wheel lands on. Scroll the wheel to pick a technique, tap Start, or press and hold on Bodie, then breathe with him. No account needed to begin. Collin's 3-minute intro film shows why he made GroundApp and how to use it. CHECK IN WITH BODIE Tap Check in on Home. Name how you feel, rate how strong it is and your energy. GroundApp maps that to a nervous system state and matches breathwork to it. Anxious and wired gets something different from flat and foggy. LIBRARY Techniques: more than 40, including Box Breathing, 4-7-8, Physiological Sigh, Resonance Breathing and Cyclic Sighing. Each has a practice guide: purpose, steps, length and safety. Advanced: O2 and CO2 tables for breath-hold training. Start from a ready-made table or build one from your own reference hold. You begin each hold and can stop any time. Dry land only. Never in or near water. Guided: sessions in Collin's voice, with ambient sound and haptic cues. Sleep sounds: rain, ocean waves, brown noise, a crackling fire and more. AURA (PREMIUM) Aura is Collin Chartier's AI expert in nervous system regulation. Sign in, check in, and Aura builds a plan: two or three techniques, about 10 minutes, with a note on why each fits how you feel. Aura asks before anything leaves your phone, and you can turn it off any time in Profile. Without Aura you still get a plan from your answers. PROGRESS Track your streaks and session history. Take the BOLT test, a comfortable breath hold timed in seconds, and watch your scores over time. Training history keeps your Advanced tables and holds. LIVE HEART RATE Tap the heart button in the player to connect any standard Bluetooth heart rate monitor, or a Whoop or Garmin with heart rate broadcast on. Watch live heart rate and HRV (RMSSD) as you breathe, then get a recap and charts. HRV needs beat-to-beat data. APPLE HEALTH AND WEARABLES Turn on Apple Health and GroundApp reads heart rate, HRV, sleep, steps and active energy to suggest the right breathwork for today, and saves your sessions to Health as mindful minutes. Whoop, Garmin, Oura, COROS and other wearables also reach GroundApp through Apple Health: sync them there, then switch it on here. Readings inform suggestions. They are not a medical assessment. PRACTICE YOUR WAY Set the session timer from 3 to 20 minutes, a custom length or no limit. Layer in music, nature sounds, voice guidance and haptics, each with its own volume. Haptic-only mode is for silent practice. APPLE WATCH Practice on your wrist with the Apple Watch app. FREE AND PREMIUM Free: 4 core techniques, the session timer, streaks, basic stats, check-ins with Bodie and live heart rate. GroundApp Premium adds all techniques, the Advanced O2 and CO2 tables, guided sessions and Aura. Use GroundApp as a guest, or sign in with Apple or Google. GROUNDAPP PREMIUM SUBSCRIPTION GroundApp Premium is an auto-renewing yearly subscription at $39.99 per year in the US. Eligible new subscribers get a 3-day free trial. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless you cancel it at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in Settings > your name > Subscriptions. Terms of Use: https://groundapp.live/terms Privacy Policy: https://groundapp.live/privacy Intense techniques show a short safety note before you start. If you have a heart, lung or other medical condition, check with your doctor before you begin a new breathing practice. If you're dealing with panic attacks, trauma, or thoughts of hurting yourself, start with a licensed professional. In the US you can call or text 988 any time. This is coaching and education, not medical or mental health treatment.