Calendar Lock PEA encrypts calendars and displays them in a month, week or day view. The shown calendars are never stored unencrypted on your disk (unless you explicitly decide to do that), but exists only in the memory (RAM).
The program is small and consists of a single archive file. Installation is not required. Calendar Lock PEA is compatible with iCalendar data (ics files as defined in RFC 5545 and RFC 7986), such as those used in Android, OS/iOS, Microsoft Outlook and many other areas. The program is in an early state.