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After the purchase of a subscription, you can manage it and disable it at any time in the settings of your iTunes account.  The unused trial period will be voided if you purchase the subscription during this period.  Check your heart rate instantly with your iPhone.  Payment will be charged from your iTunes account after you confirm the purchase.  Whether it's a breakup or a panic attack, App gives you the tools to express what you are feeling, so you don't get stuck in your thoughts.  The app will give you detailed charts for each of your new habits and health indicators.  A trial-free period is provided within 3 days since activation.  Your subscription will recur every 1 week for $8. 99.  Pressing too hard may affect blood flow and make it hard to get accurate results.  Hold your device steady and keep still until the measurement ends.  Place your finger on the back camera lens and completely cover the lens.  The subscription is auto-recurring.  A perfect anxiety and depression tracker.  Monitor and analyze your progress.  The more you use the app, the better you understand what is happening with your body and mind.  No other devices are needed!