Meet the Walabot DIY 2: a visual stud finder that connects to your smartphone to give you X-ray vision into your wall. It combines with your phone to help you find the center of every stud and avoid potential safety issues when drilling into your wall.
The Walabot DIY 2 has a completely wireless design and runs on a rechargeable battery that lasts up to 5 hours. It uses 4D radio frequency technology to see 4 inches into drywall and has dual modes (Images & Expert).[where to get it]