Pulse Checker & Heart Rate. funktioniert nicht

It can periodically display heart rate changes and help you know yourself better, track your health, and lead a healthy life. - Get your heart rate and heart rate variability analysis in less than 60 seconds, personalized and explained in detail. - Get visual display of daily, weekly and monthly data.  Intuitively to track your heart rate changes with comparison bar chart. - Lightly place the tip of a finger on the camera lens. - Be sure your fingertip fully covers the camera lens and the flashlight.  Any unused portion of a free trial period will be forfeited when the user purchases a subscription to that publication. * Please seek a doctor's advice in addition to using this app and before making any medical decisions. * This app is not designed for medical use.  You may manage your subscription and auto-renewal may be turned off by going to your Account Settings or through No cancellation of the current subscription is allowed during the active subscription period.  Just place your index finger on the back camera lens and the flash, you can read your heart rate right away.  Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period.  Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified.  Payment will be charged to iTunes Account at confirmation of purchase.  If you’ve ever wondered how to get fit and healthy with minimal effort, look no further.  Our app is your all-in-one solution for that.  It is meant for fitness use only and as a source of general information.