Google Fit is a free weight loss and fitness app from Google that helps you track your activity simply by carrying your Android phone. This also works with devices like Android Wear smartwatches. You can also connect apps to the service to extend the tracking and fitness.
This app can help you track your weight, your daily activity and specifically the daily heart healthy activity. With a goal to move 60 minutes each day and a pedometer goal, there are multiple ways to help push you to move more while you go about your day, even when you can't get to a gym.
Google Fit is free for Android and works with most Android smartphones.