Camera Heart Rate Variability vs Yinstill

Measure heart rate variability (HRV) with your phone's camera. No chest strap or other sensor needed. Place your fingertip over the back camera and flash. The app detects each heartbeat from small changes in the color of your skin (photoplethysmography, PPG), then computes beat-to-beat intervals and HRV in real time. Camera Heart Rate Variability was the first app to record, plot and export time and frequency domain HRV features from the phone camera alone. It is built by the team behind HRV4Training. The camera method was compared with ECG and a Polar H7 chest strap in a peer-reviewed study (Plews et al., International Journal of Sports Physiology and Performance, 2017). WHAT YOU GET • Live heart rate and pulse waveform while you measure, with rMSSD and signal quality for each window • RR intervals with optional artifact correction • Line charts of RR intervals, heart rate and each feature, plus a Poincaré plot • Time domain features: SDNN, rMSSD, pNN50 • Frequency domain features: LF, HF and LF/HF • Analysis window from 30 seconds to 5 minutes • Record for as long as you need and stop when you are done • Optional breathing pacer • Compare up to three recordings with overlaid histograms of any feature • History of all your recordings with heart rate and rMSSD trends • Export heart rate, RR intervals and features as CSV, to Files, Dropbox, email or any app • Write heart rate and HRV to Apple Health HOW TO GET GOOD DATA Sit or lie still, rest your hand on a surface and cover the camera and flash fully with your fingertip, without pressing hard. The camera preview turns red; then keep still until the end. Signal quality is worked out from the data for each window, as the share of beats that needed correction. WHO IT IS FOR Athletes, coaches, researchers and anyone curious about their stress and recovery who wants raw HRV data without buying a sensor. If you want daily morning measurements with guidance and trends, have a look at HRV4Training. Requires an iPhone with a camera flash. This app is not a medical device and is not intended to diagnose or treat any condition. Questions or feedback: hello@HRV4Training.com

A supportive space for education, connection, and steadiness along your fertility journey. The Yinstill Patient Hub™ is designed to extend the care and guidance you receive through Yinstill Reproductive Wellness into your daily life. This is not simply another fertility app. It is a calm, structured support environment created to help patients feel informed, connected, and supported between appointments and throughout the broader arc of their journey. Inside the app, you’ll find a growing library of educational resources, community discussions, live events, challenges, and guided support designed to help reduce overwhelm and create greater clarity and consistency. Whether you are trying to conceive naturally, preparing for IVF or IUI, navigating loss, supporting male fertility, or simply looking for a more grounded and informed approach to reproductive wellness, the Yinstill Patient Hub™ was built to support you. Inside the Patient Hub Community & Connection Connect with others walking a similar path through discussion spaces focused on fertility, IVF and IUI support, lifestyle practices, mental-emotional wellness, and general community connection. Educational Resources Access fertility education, wellness guidance, downloads, mini-courses, podcasts, and ongoing content from the Yinstill team. Live Events Join live Q&A sessions, workshops, webinars, and community conversations hosted by the Yinstill team and guest experts. Challenges & Accountability Participate in wellness and lifestyle challenges designed to encourage consistency, engagement, and supportive habits through simple gamification and community participation. Notifications & Updates Stay connected with announcements, upcoming events, new resources, and important community updates through optional notifications. A Calm, Structured Experience The app is designed to support learning, reflection, and connection without pressure, comparison, or urgency. Patients are encouraged to participate at their own pace, whether that means actively engaging or simply listening and learning quietly at first. Who This App Is For The Yinstill Patient Hub™ may be helpful for individuals and couples who are: • Trying to conceive naturally • Preparing for or undergoing IVF or IUI • Navigating fertility uncertainty or recurrent loss • Looking to improve lifestyle and wellness foundations • Supporting male fertility and reproductive health • Seeking a more connected and informed fertility experience About Yinstill Yinstill Reproductive Wellness is a fertility-focused clinic and educational platform dedicated to supporting patients through a whole-person approach to reproductive health and fertility care. The Yinstill Patient Hub™ is intended to complement ongoing medical and fertility care, not replace it. We’re grateful to be part of your journey. END USER LICENSE AGREEMENT https://www.apple.com/legal/internet-services/itunes/dev/stdeula/