Widely applied: A versatile ab workout device with an integrated phone holder to provide consistent support during sit ups, planks, and other fitness activities. Optimized workout comfort: Comfort focused design improves force distribution and ergonomic stability, offering a foot stabilizing fit to naturally boost sit up performance. Three grade height adjustment: Three adjustable levels accommodate different body types and exercise angles, helping to improve efficiency during workouts. Suction security: A performance base with double suction cups and natural rubber pads delivers strong suction for stable floor grip. Use scenario: At home, attach to a clean flat floor to perform sit ups and planks with the phone within view in the holder for timers or coaching. Use scenario: In small spaces or apartments, a compact setup with easy height adjustments supports a range of users without bulky equipment. Use scenario: As you progress, vary height and angle to introduce stimuli and maintain proper form during core training. Key attributes: function includes a built in phone holder and foot stabilization; performance comes from a double suction base with natural rubber pads; adjustable height supports different body types and exercises.