Make your photo "Focus"! You can select an area you wanna focus in your photos, then "Focus Effect" will blur the background and do all the work for you. By using this app, you can become a photographer even without a good camera. There are also multiple photo effects included in the app, such as black-white and retro style. You can pick a photo from your gallery or take a photo by your camera from inside the app. Photo sharing is supported as well.
Google Play link: https://play.google.com/store/apps/details?id=com.dumplingsandwich.focuseffect