You can view all of your installed application usage details using the application usage monitor. Track whatsApp and other installed application usage on your phone using this app now.
The application usage analysis shows your daily WhatsApp usage and your last Online time for WhatsApp. It also lets you know how much time you use your application.
The app also keeps reports of past days and provides statistics. Using it you can see which times you use WhatsApp and other apps. You can get instant notifications of your usage analysis.
The app also shows you how much time you spend in an app. It notifies you for long time and excessive use.