Bigjpg is a free Android application developed by bigjpg.com that uses the latest Deep Convolutional Neural Networks to enlarge images without losing their quality. It works by intelligently reducing noise and serration in images to produce high-quality enlarged images.

The app is very easy to use. Simply upload the image you want to enlarge, select the desired enlargement ratio, and let Bigjpg do the rest. The app also allows you to compare the original image with the enlarged image side by side, which is a useful feature for evaluating the quality of the enlargement.

Overall, Bigjpg is a great app for anyone looking to enlarge their images without sacrificing quality. The app is free, easy to use, and produces impressive results. However, it is important to note that the app requires an internet connection to work, as it sends the image to a server for processing.