The aim of the APP is to simplify the management of your own contacts. Additions to the contacts, such as additional information, date-related notes and planned appointments can be recorded in the APP.All information collected with the APP is stored internally within the APP. There is no connection to the internet!The advantage of the app is that I can manage groups in categories and thus map a "and/or" link between groups and contacts.The following can be used as a search function:- Group filter: a long press opens the selection dialog directly- a> z: Jump to the first letter- Filter: the input combination is filtered.Settings can be used to switch the display from first name to last name to last name, first nameAll information about a contact can be clearly printed out on a contact sheet.A transfer of the contact appointments in the standard calendar can be activated (settings)In the settings, the display can be adapted to your own needs, e.g. colors, text sizes, etc.A distribution list for SMS or emails for a selected number of contacts (group filter) can be created and automatically transferred to the Android SMS or email programThe following rights are required:- Read rights to the Android contact database- Write access to the external memory (used to store the contact sheet, data backup and reports).- Access rights to the calendar, if I also want to enter the dates here in the Android calendar.The APP does not change any external data and can therefore be used without risk. Only the appointments that were created by the app are deleted from the central calendar.You can export the data of the APP at any time, e.g. to transfer it to a PC. This was one of the reasons for developing this APP.The export can be done as an SQL script (can be imported into MySQL, PostgreSQL, ...) or via CSV files (Excel).In the PRO version, this SQL script can also be imported again. This makes it easy to import to a second android device.