When artificial intelligence transforms your mobile phone into a personal assistant

The Roll is a new smart app that can help you organize the thousands of photos you take with your mobile phone. The app scans a photo library, analyzes each image and tries to detect the ones that are similar. It then sorts the images into groups so copies can be deleted. The app also gives each image a score as a measure of its quality. It doesn't always get it right: a professional fashion image taken in a studio obtained a quality score of 50%, although it may help the user to know which photos are better or worse before sharing them.