Best Overall: Sortly ( iOS, Android)
Sortly allows you to organize your home inventory in several different folders and subfolders to make things easier to locate. Use folders to group items by their physical locations (which room they're stored in) or by item type. Add searchable tags and notes to find what you need in seconds.
A Mac App Store Editor’s Choice, Home Inventory has been helping people around the world document their home & belongings since 2005. Called 'Quick and easy to use' by the New York Times and a Mac App Store pick for “Best of 2013” by Apple, Home Inventory is the go-to tool for organizing details about your home and belongings for all your household needs.
Sortly also allows you to record an impressive level of detail for each item in your home. Add a serial number, purchase date, SKU number, warranty expiration date, and more. Include up to eight photos of each item to keep a visual inventory and list quantities and prices to calculate the total value of the items in your home. You can transfer and export the items to a CSV file, export to Dropbox, PDF, or Evernote.
This app is especially helpful if you're moving. You can create printable QR labels with Sortly and stick them to your moving boxes, and a simple scan shows you a list of that box's contents. If you loan items to family or friends, Sortly gives you a place to enter the name of the loanee with a reminder for when they're supposed to give it back.
The basic version of the Sortly app is free, but you must pay either a monthly or annual fee for the premium version.