Pedometer and Health Watcher, developed by GTSStar .co, is a free Android app that can estimate your vital signs using only your smartphone's camera. This innovative app can estimate your heart rate, blood pressure, respiration rate, and oxygen saturation level by applying image processing techniques to the RGB intensities captured by your phone's camera.

The app also includes a pedometer that stores your step count per hour and allows you to review your daily, weekly, and monthly reports, which display your calculated distance and calories. Additionally, Pedometer and Health Watcher can record your training sessions and remind you if you are in danger of not achieving your daily step goal. The app's ability to estimate vital signs without requiring any extra sensors makes it a convenient and cost-effective option for people who want to monitor their health.