Philips Sonicare' s most revolutionary toothbrush to date! Flex Care Platinum Connected takes the guesswork out of oral care. Smart sensors send your brushing data to the free Sonicare app via Bluetooth wireless technology, providing you personalized coaching and instant feedback for the most complete clean possible! From the #1 recommended brand by Dental Professionals. As per the manual, consumers should start brushing at the upper, right quadrant of their mouth. If not started in this position the App will effectively align with the brushing activity.