Passwords is designed to help you store, organise, protect and use sensitive information like usernames and passwords for websites, PINs, bank details, serial numbers etc.
You can create any number of fields (and call them what you like) to save your information to. Information can be quickly accessed and copied to the clipboard, and URLs can be opened in you default browser.
Your data is stored in a database, the sensitive information is encrypted. The app can be optionally password protected by a master passcode.
The app uses iCloud to sync your data between devices, you manage this via your device settings.
Available on iOS as "Passwords+"