Plank Counter - Auto Count is an iPhone app developed by INTERSECT KK in the Lifestyle category, specifically tailored for Health & Fitness enthusiasts. The primary function of this app is to efficiently count planks, offering features such as notifications, recording of active energy and workouts to Apple Health, saving results to the photo library, and viewing history. It also includes a proximity sensor, except for Dynamic Island devices. Users can simply place their iPhone on the floor, tap the start button, and end the session by tapping the done button. Additionally, the app provides calculations for active energy expended during the workout. Language options include Japanese and English.