"くるあ" is a comprehensive health and fitness lifestyle app available on iPhone. The app offers various features to help users monitor and improve their overall well-being. Users can assess their locomotive syndrome status through 7 locomotive checks and the "Loco 25" assessment. Additionally, the app provides insights into hip joint health, with the ability to measure range of motion through video recording and visualize results with radar and bar charts.

For tracking daily activity levels, "くるあ" allows users to input their everyday and exercise activities to automatically measure their total daily activity (METs). The app sets a target of 3.3 METs per day and 21 METs per week to promote health. Moreover, users can access joint morning routine exercise videos and sync their data with Apple Health for step, distance, and stair climbing tracking.