Colorize is a photo colorization app used to colorize your old and black and white photos. It's fully automatic and based on advanced Automatic Machine Learning. There are two functions, the first one is called Picture Colorizer and the other is called Old Photo Enhancer, these two functions are in the same application. The whole process will be done in a few seconds, it will not take much memory and it will not impact the phone's performance. There's also this function called Old Photo Enhancer which is used to make the photos more vivid and clear.