ECG Recorder for Polar H10

ECG Recorder turns a Polar H10 chest strap into an overnight ECG logger. It records the raw single-lead ECG at 130 Hz, heart rate with RR intervals and the accelerometer for as long as you want — through the night, screen off, app swiped away — and keeps everything on your phone. REQUIRES A POLAR H10 chest strap (Bluetooth Low Energy). Other sensors are not supported. What you see live • scrolling ECG on a millimetre grid with beat markers • heart rate from the ECG and from the strap, skin-contact check • heart-rate variability (RMSSD, SDNN, pNN50, LF/HF, DFA α1, sample entropy) • estimated breathing rate from three sources • signal quality, movement, posture, “strap on body” check What you get from a recording • full-length overview with trends of heart rate, breathing, HRV, QTc and premature beats • “Only reliable data” (on by default): stretches where movement, a loose strap or clipping disturbed the signal are shown as grey bands and left out of the numbers, with the reason in plain words • tap any chart to place a time marker (ISO 8601) • select an interval and export a PDF report: summary tables, an averaged beat with automatic interval measurements, and 10-second strips on ECG paper (25 mm/s, 10 mm/mV) with beat classes and RR intervals — ready to show a doctor • open data files (raw µV samples, JSON lines) you can analyse yourself • mark an event with one tap, also from the notification — your note appears in the overview and in the report Alerts while recording (optional) • heart rate above or below limits you set, with a hold time and an option to alert only at rest • strap off the body, connection lost, low battery or storage • delivered as notifications; they are not a medical alarm and do not replace medical care On a computer: save a recording as a ZIP file and open it in the free ECG Viewer at ecgrecorder.digitalpurr.com/viewer — the whole night on ECG paper, a more thorough beat analysis, HRV and exports. It runs in your web browser, also offline, and the file never leaves your computer. Languages: English, Polish, German, Spanish, French, Italian, Russian, Czech, Slovak, Dutch, Swedish, Finnish, Hungarian, Croatian, Greek. Privacy: no account, no cloud, no network permission. Recordings never leave your phone unless you share them. ECG Recorder is not a medical device and does not diagnose, treat, cure or prevent any medical condition. All values are automatic estimates from a single consumer lead. Consult a healthcare professional for medical advice, diagnosis or treatment. ECG Recorder is an independent app and is not affiliated with or endorsed by Polar Electro Oy. Polar and H10 are trademarks of their owner.