Are you on an Android 4.4 or higher based device and find the camera lacking in features? Do you want to take Photosphere or Lens Blur pictures just like the Nexus 5? Then check out the official Google Camera app.
The camera app from Google can be downloaded directly from Google Play as an official Google app but currently requires Android 4.4 (KitKat) or higher. While the camera, video, and panorama modes are standard, the app introduces two features otherwise not available.
The first is Photosphere. This lets the user take highly immersive pictures in 360 degress. It can be thought of as a panorama on top of a panorama as far as size and scope. To take a Photosphere, the user needs to center the viewfinder into the dots which takes individual pictures. When the checkbox in selected, the Photosphere is processed and is ready to share.
The second feature if Lens Blur. What this feature does is focus on an object or person in the viewfinder and blur the background for additional foreground focus. Lens Blur achieves this by taking the initial picture and the user moving the phone vertically or horizontally depending on the direction the phone is angled. If the user moves too fast or the foreground object is no longer centered the app will let the user know. Processing works similarl to Photosphere and will show up in the Gallery when ready.