The best tool to edit your photos is Photo Lab Editor.

The best photo studio to enhance all of your images! Edit pictures using mosaic to add overlays, HDR, vignetting, and more to backgrounds. Get unique pictures from your favorite photo booth with photo blur, background defocus, Gaussian blur, and other special effects.

The first thing you need to do is to open the app and choose a photo from your device. Then, you need to select a photo that you want to enlarge, and that is it. You can now send it to your friends and family.