Photo Swipe is a HTML/CSS/Javascript based Image Gallery designed and developed exclusively for the mobile devices. Currently Photo Swipe supports iOS, Android, Blackberry, jQuery framework and PhoneGap mobile framework. In order to test its functionality I opened the demo url of Photo Swipe on my iPhone. Surprisingly the output was excellent in terms of its flexibility and smoothness while switching between different images. The image gallery is adaptive to both landscape and portrait mode.
Here is how it looks on my iPhone on landscape and portrait mode. I guess you probably get the same output for other mobile platforms.
Photo Swipe also works on desktops, so if you want to create a universal photo gallery for your next project, I recommend giving a look at Photo Swipe.