I bought the plugin and when I try it out on my server using Safari on Iphone, it seems to crash when I zoom in and out by pinching quickly. It says "A problem repeatedly occurred on http://......."
Here is my site: http://ftp.directprinting.com.hk/nippon2/3dflipbook/index.html
Here is a video of when that happens:
I added - <meta name="viewport" content="width=device-width" /> to the HTML header. It seems to solve the problem.