Steps+ is a pedometer app for iPhone that uses the step counting functionality of your iPhone without draining your battery. It is the most efficient and smart pedometer app in the market. With Steps+, you can track your daily step counts, calorie burn, distance, and floors climbed (on supported devices). You can also merge your Apple Watch steps to get credit for all your steps, even when you're not carrying your phone.

Steps+ allows you to set a daily goal for either the number of steps or calories burned. You can track your progress towards your goal on any given day or the current week. You can also receive notifications when you reach your goal.

The app provides a nice chart that shows the last week's worth of steps, and it also integrates with the Health app to bring in your step history. Steps+ also offers additional features like a Today widget for quick access to today's stats, hourly stats for the past week, and data export to a CSV. You can also choose from different themes to customize the app's appearance.