Polarr

The application comes with various color masking and brushing tools for making changes and adjustments to photos. You can create, customize and even share your own filters for others to use. Moreover, the app comes with multiple local and brush adjustments, as well as options for arranging the toolbar and workspace.
 
You can adjust colors on photos, change temperature, tint, vibrance and even saturation. You can also make changes to brightness, contrast, exposure, clarity and even sharpen details. In addition, you can use vignette tools, adjust lens distortion and add effects. The app even lets you adjust saturation, luminance and add color curves. Tone balancing and shadow tone are also available.