Twitter has introduced filters and effects powered by Aviary for mobile apps to enhance the images you tweet . Now you can edit and refine your photos, right from Twitter for Android.
Twitter Photo Filters - Introduction Video
In new Version 
- Filters: Apply one of eight filters, ranging from black & white to vintage, to add a new look and feel to your photos.
- Take a bird’s-eye view: See how each filter would affect your photo in a single grid view, or swipe through looks to compare your options.
- Frame the action: Crop and pinch to zoom in order to focus attention.
- Auto-enhance: Make your photos pop with balanced light and colors by tapping the wand.