Sony is opening up their pre-installed activity tracking app, Lifelog, to developers with a new API. This means third parties can haul location, app usage, and physical movement data gathered by Lifelog into their app (provided users give consent, of course).
Lifelog gathers its data with an Xperia device's built-in sensors, paired fitness trackers, and manual input.
Developers interested in trying this out can dig into the Lifelog API documentation over here.
Source: Sony Developer World