Startup Idea: Health-conscious Software for Correcting Computer Posture

Startup idea to develop a software that detects and alerts users with improper computer posturing, aiming to maintain good health and avoid physical discomfort like numbness in pinkie finger.

I get numbness in my pinkie finger when I rest my hand on my desk the wrong way while at the computer. Maybe some software that can alert me and correct my bad posture so I can avoid this?.