Jan. 3 (Bloomberg) — Samir Damani, a practicing cardiologist, hasn't really fit in at the International CES in Las Vegas, where 3D televisions, connected cars and the latest gaming consoles abound. Until this year.

As founder of MD Revolution Inc., Damani is developing software that lets consumers monitor their health, nutrition and fitness on smartphones. At CES, formerly called the Consumer Electronics Show, he's introducing RevUp, which uses data from devices such as Fitbit's Wi-Fi scale and the Withings blood- pressure monitor and supplements it with lab tests to provide customized advice.

Of the 3,300 companies exhibiting at the conference, starting on Jan. 7, about 300 are focused on digital health, said Gary Shapiro, president of the Consumer Electronics Association. Looking to gain customers in a market that's expected to quadruple by 2018, companies are unveiling wearable health and fitness monitors, sensors for the home and software to tie it all together, providing real-time data for consumers.