Fits all size smartphones.


Making the Plank Exercise Fun

The challenge of improving the plank exercise and making it fun was no easy task. It took 12 months to design a perfectly balanced platform that would move at every angle in 360 degrees.

This turned the static plank exercise into a dynamic workout making it possible to isolate over 29 core muscles in less than 3 minutes.

In order to make the dynamic plank fun we created the STEALTH CORE CHALLENGE Gaming app. Adding Gameplay technology distracts the user by gamifying the experience in a fun progressive motivating way. You actually push yourself harder trying to score more points and in reality you get a better core workout.

Game Your Way
to a Flat Belly

Order Your Stealth

Smartphone Cradle

Any size smartphones will fit securely both horizontal and vertical in the tapered phone cradle


Support base houses the fluidity sphere for perfectly balanced motion while you exercise. Non-slip Nylon base material.

Ultra Comfort Arm Pad

Proprietary molded foam pad provides deep-cushion support for relief from fatigue and discomfort.

Dynamic Planking Platform

Tilt and twist at any angle and move a full 360 degrees for the ultimate core workout.