The Details section of FITIV displays more of the metrics that you want to track including sleep, calories consumed, and resting heart rate. This data is read by the app from Apple Health, which allows it to display the data you track in other third-party apps.
To get your data displayed in the Details ensure that your other third-party apps are writing data to Apple Health. Most third-party calorie counting and sleep tracking apps (i.e. LoseIt, MyFitnessPal, AutoSleep) can be set up to sync data to Apple Health, and once that data is populated into Apple Health it can be read and displayed by the app.
The menu displayed at the top of the Details view gives you the option to toggle between DAILY, WEEKLY, MONTHLY or YEARLY breakdowns for your workout time and calories burned. Please note that your WORKOUT TIME information is derived from your workout history, and will only count workouts appearing in the workout list.
Your CALORIES BURNED information is stored within Apple Health, so enable APPLE HEALTH AND ACTIVITY SHARING in the MORE section of the iPhone app is required for accurate cumulative calorie data.