As you know rcdetails.info - it's database (motors, esc, batteries, servos etc).
RCdetails - app for Windows Phone. There are 2 versions: "free" and "full" ($0.99). There is no difference in functions and features.
You can buy full version if want to say "thank you" :)
This app contains "bookmarks", you can add any products to bookmarks and send links via email to your address or to your friends.
P.S. Right now I'm working on version for Android and my friend working on version for iPhone.