"Client card" is an card file, which is focused on working with customers. It is a free version of the "Client database" application (with a limited set of features, but without ads). Cards have a field that can be displayed in the list as a color chart. It is possible to save the database in text and csv format (for data transfer to spreadsheets).
There is a function of creating a backup copy and sending it to an external storage. With each successful database load, an automatic reserve is created, which allows you to also roll back to the previous state. Field settings are stored in the database and are independent of each other. It is most difficult to completely remove the database and records from it to avoid accidental loss of data.