Filters allow you to apply effects to your image with one touch, usually with a range of effects such as retro films or sketches.
Image sharpening tools emphasize the edges within an image. This can be applied to a blurred image to make it appear sharper and more detailed.
The app offers more crop sizes (such as 4:3, 1:1, 4:5), giving you more versatility when editing your images.
You can build up an image using layers, adjusting the settings for each one independently. This is a sign of a more powerful image-editing app, and allows you to create more complex images.