This App will support counting of Back Extension. The main function is counting of Back Extension.

Main Function
・Count Back Extension
・Notifications
・Record Active Energy and Workouts to Apple Health.
・Save Results to Photo.
・View history.

How to use
・Put iPhone on floor
・Tap start button.
・Keep your face close to iPhone screen. (Upper part) *
・Or count on iPhone screen tap.

Active Energy
・Ex. METs 3.5, Weight 50 kg, Time 10 min. (3.5 - 1) x 50 x (10 / 60) x 1.05 = 21.86 kcal.

Optional permission requests
・Apple Health: It is used to record data in Apple Health.
・Tracking: It is used to deliver personalized ads to you.
・Notifications: It is used to sending notifications.
・Photo Library: It is used to save image in Photo Library.

Languages
・Japanese, English.

*Dynamic Island devices not supported