The site scans and synchronises with pre-registered podcast directories or ranking sites every hour and generates RSS feeds for each top 10 podcast. The sites registered in Popcasts include: Apple iTunes Podcasting, Odeo, Podnova, Podfeed, iPodderX, PodcastPickle, Podcasting News and Podcast Alley.
The site also has Popcasts Japanese, which aggregates Japanese podcast directories.
Podcasters that want to add a directory or ranking site to Popcasts can contact Podium at english-admin at po-di-um.net.
