Heart Rate Variability Logger vs AI Endurance

Record, plot and export heart rate variability (HRV) from a Bluetooth heart rate strap, beat by beat. HRV Logger connects to any Bluetooth Low Energy chest strap that sends RR intervals (we recommend the Polar H10). It stores every beat, computes HRV features in real time and lets you export the full recording for your own analysis. WHAT YOU GET • Live heart rate, RR intervals and HRV while you record • Time domain features: AVNN, SDNN, rMSSD, pNN50 • Frequency domain features: LF, HF and LF/HF • DFA alpha 1, for example to estimate the aerobic threshold during exercise • Feature window of 30 seconds, 1, 2 or 5 minutes • Optional RR correction to reduce the effect of artifacts and ectopic beats, with artifact counts per window • Threshold filter, and the option to hide noisy windows • Annotate events, or set up prompts that ask you to annotate during a recording (experience sampling) • Compare up to three recordings side by side • Optional step count and location to add context • Heart rate on the app icon while recording • Apple Watch app with real-time HRV • Export as CSV or in a Kubios-ready format, through Files, email or Dropbox BUILT FOR LONG RECORDINGS HRV Logger has been tested with recordings longer than 24 hours, and reconnects to your strap if the connection drops. WHO IT IS FOR Researchers, coaches and athletes who want raw beat-to-beat data and full control over the analysis. If you want daily morning measurements with guidance and trends, have a look at HRV4Training. Requires a Bluetooth heart rate strap that sends RR intervals. Optical wrist and arm sensors usually don't. Background location uses more battery; you can turn it off. This app is not a medical device and is not intended to diagnose or treat any condition. Questions or feedback: hello@HRV4Training.com

AI Endurance is the data-driven AI coach for running, cycling, and triathlon. It learns from your own training to build a model of you (your fitness, your recovery, your race goal), then shapes your plan around that model and adapts it every day, so you always know what to do next. WHY ATHLETES CHOOSE AI ENDURANCE • Adaptive AI training plans: Set a race goal and get a full plan that reshapes itself as your fitness and recovery change. No more rigid plans that fall apart after one bad week. • Recovery you can trust: We read your HRV, resting heart rate, and DFA a1 to tell you when to push and when to back off, so you train hard without digging a hole. • Talk to your AI coach: Ask questions in plain language. Change a workout, understand your data, or plan your week just by chatting. • See inside every workout: Power and pace curves, durability, decoupling, and drift analysis that show exactly how your fitness is changing. • Built to peak, not just predict: Most apps stop at predicting a race time. AI Endurance builds your entire plan to optimize your race-day performance, and refines it as your data changes. • Two-way sync, not just a connection: AI Endurance imports your workouts from Garmin, Strava, Coros, Polar, Wahoo, Suunto and more, and reads your recovery data from Oura, Whoop, and your watch. Then it pushes your planned workouts straight to Garmin, Coros, Wahoo, Zwift, TrainingPeaks and more, ready to train with no manual entry. FOR EVERY ENDURANCE ATHLETE Whether you're chasing a first 5K, a Boston qualifier, a century ride, or an Ironman, AI Endurance meets you where you are and grows with you. Runners, cyclists, and triathletes all train from one adaptive plan. Train smarter. Recover better. Race faster. Download AI Endurance and get a coach that actually adapts to you. By using AI Endurance, you agree to our Privacy Policy and the Apple Standard End User License Agreement (EULA). - Privacy Policy: https://aiendurance.com/privacypolicy - Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/