Apple sold 5 million iPhone 5 phones in the first weekend; thus, the new smartphone was available, so the newly compatible iHealth Wireless Blood Pressure Wrist Monitor has a lot of potential. Right now, it’s one of the hottest selling items in the blood-pressure monitor space with more than $137,000 in sales for the 12 weeks ended Aug. 12, up a whopping 45,882.2% across food, drug and mass (excluding Walmart), according to SymphonyIRI Group. The new wrist monitor adds motion sensor technology to increase accuracy.