If you want to keep track of your steps without downloading anything extra , you can use the Health app that's built in on your iPhone. There's also the option to customize your step goals so you stay motivated and on track for weight loss. If you also use it to track your food intake, your daily calorie bank will adjust appropriately depending on how many daily steps you log. In addition to being a step tracker, this app can also log your food and hydration each day while managing your health and fitness goals. The 6 Best Calorie Counting Apps. Cost: free Get it for iOS or Android.