The application Lockmix accesses the following private information on your phone.
Your photos and pictures are only accessed if you use a widget to display a custom picture on a tile or as a wallpaper. The data stays on your phone and is not transferred anywhere over the network.
Your calendar data is only accessed if you use the Appointments or Calendar widget. It is used to display or highlight your upcoming appointments. The data stays on your phone and is not transferred anywhere over the network.
Your location is only accessed if you use a widget that requires it (e.g. Map or Weather). You will be asked for a permission to use your location first. The location information is used solely for the purpose of providing the functionality of certain widgets, e.g. where to show the weather from or what portion of the map to display, and it is sent to the web services providing data for these widgets. The location information is not used in any other way. You have the option to use a custom fixed location for these widgets instead of using your actual location.