System Haptics on the iPhone 7. Apple introduced the Taptic Engine with the iPhone 6s, where it replaced the old vibration motor and was also used to provide haptic feedback for when you activated 3D Touch. This year with the iPhone 7, Apple has improved the Taptic Engine and it plays a critical role in simulating the press of the Home button, which is no longer a physical button.
The Dietary Guidelines for Americans 2010 recommends that sedentary teenage girls consume 1,800 calories per day. Active teenage girls get daily physical activity that is equivalent to walking more than 3 miles per day at 3 to 4 miles per hour. These teens need 2,400 calories per day.
Caloric Intake for Women. According to the Center for Nutrition Policy and Promotion, average-size women between 19 and 30 years of age should get 1,800 to 2,000 calories per day if they're inactive, 2,000 to 2,200 calories if they get a moderate amount of exercise and 2,400 calories if they're consistently active.