Sound Off! What fitness apps keep you healthy?

Now that Apple has resolved issues with Healthkit, a ton of new apps are starting to support it. Fitness tracking and health monitoring are becoming huge features that device makers want to take advantage of, and even Google is getting into the game with its own initiative called Google Fit. Are you using a combination of swanky hardware and smooth looking apps to stay in shape? Head over to the Engadget forums and share your favorite health tracking apps.