If you want to stay in the "Unity state of mind" and keep your code platform independent (even if just so you can easily test on your desktop), I found the easiest way to handle gestures is using one of the gesture plugins.

I can recommend two:

1. TouchKit by Prime31 - free and open source
2. Input.Touches - available in the asset store, not free.

If you want to stay in the "Unity state of mind" and keep your code platform independent (even if just so you can easily test on your desktop), I found the easiest way to handle gestures is using one of the gesture plugins.

I can recommend two:

1. TouchKit by Prime31 - free and open source
2. Input.Touches - available in the asset store, not free.

Also worth mentioning is TouchScript a very professional free library, but may be an overkill for your needs.