You group notes or contacts in folders. Any folder can have any number of subfolders, which can also have any number of subfolders to an unlimited level. Any note or contact can exists in any number of folders at any place in the hierarchy. Change a note or contact in one folder and it is automatically updated in all other folder. Unlimited number of user-defined fields for contacts.
Any contact can have an unlimited number of user-defined fields.
You can add fields to an individual contact, or all contacts in a folder. For example, you can add a wedding anniversary date to a single contact. Each database is stored in one single file. Sajer does not use relational databases like dBase or Btrieve. Each database uses one single file simplifying file management.