Apple Inc. unveiled new details about its upcoming Apple Watch on Monday, saying the wearable device will be available on April 24 in Canada and eight other countries. The watch will have 18 hours of battery life with “normal use,” CEO Tim Cook said at an event in San Francisco on Monday, and will integrate with users’ smartphones to provide health data, notifications and messaging capabilities. The company announced pricing for the watch, which comes in two sizes, today. The sport edition begins at $449 for the 38-milimetre version called the Watch Sport, according to the...