I developed one 2-D game in unity. First I have run game on web player my screen is cutting from both ends. Now I am creating android apk from it. Then on android devices it
Free Aspect is just the current game view. This does not reflect what will be seen in the final product. I recommend using one of the preset ratio's or if your up to date with Unity3d you can add your own custom resolutions.
So if you designing for phone when its vertical (GS4 used as an example) you can set it to 1080x1920. This will give you a better representation as to what you will see on your device.