Plugin required to enable Whipps - free iPhone photo viewer, on your WordPress blog.
Install JSONView plugin for FireFox for troubleshooting your feeds and follow tests given below.
Whipps app will look for the following URLs on your blog:
Make sure that these URLs work on your blog. Your permalinks structure should start with %category% (for example: /%category%/%postname%/).
Get latest info at http://www.whipps.org.