PulseQ: Heart Rate & HRV

Measure your heart rate and HRV (heart-rate variability) by resting a fingertip on the iPhone's rear camera and flash. No sensor or wearable needed.

TWO MODES • Heart rate (20 s): a quick check of your current pulse • HRV (60 s): RMSSD, SDNN, pNN50 and mean IBI. If your finger slips, put it back and the measurement continues

UNDERSTAND THE NUMBERS • General reference bands (normal / low / elevated), color-coded • Comparison with your own 30-day median: "your usual", "below your usual", "above your usual" • A plain-language guide to RMSSD, SDNN and pNN50 with a diagram and worked example. Tap any number on the result to see what it means

SEE THE TREND • Save to Apple Health and compare with Apple Watch's resting heart rate and HRV (turn on in Settings) • Charts of heart rate and RMSSD over 7 days, 30 days or all time; tap a point for date and value • Last-7-day average versus the previous 7 days, with a short note on what it may mean • Everything is stored on your device and can be deleted any time

MORNING ROUTINE • A morning reminder (only if you haven't measured yet that day) • Streak, last 7 days, and a "Today" condition based on your own baseline

HOW IT WORKS The camera reads the tiny brightness changes caused by blood flow as the flash shines through your fingertip (photoplethysmography, PPG). Video is never stored or sent. Signal quality is shown live, and noisy readings are clearly marked as approximate. After each reading, every beat is re-detected from the whole waveform and aligned precisely for more accurate HRV.

OTHER • English / Japanese / Traditional Chinese • No account, no ads, free (the network is used only when you send feedback) • Not a medical device. Values are for reference only. Consult a healthcare professional if you have concerns about your health