ActivityTracker 2 will keep track of steps taken, distance walked, daily active calorie burn, active time, and flights of stairs climbed using the iPhone's motion processor.

One aspect I really love is that it focuses on "weekly goals" where as Apple's own Activity Tracker has daily goals. As someone who runs and lift weights, I need rest days. In Apple's model, I'd still have workout on my off days.ActivityTracker offers an Apple Watch app and a Today extension for a quick glance at your progress.

ActivityTracker can be downloaded for free on the App Store. It also has advanced features (HealthKit integration being one of them) that are unlocked with a $2.99 in-app purchase.