Here are some apps that can also help you in case of disaster.
iPad: itemizer by Digital2Analog Software. Itemizer helps you keep track of just about anything such as possessions, product catalogs, collectibles, inventory, etc. The app is available at the iTunes store for $4.99.
iPhone: About my Home by Accord Technologies LLC. About My Home is a photo, inventory and events organizer to keep track of all things around Your Home that you should never forget, but most likely will. This app is available at the iTunes store for $1.99.