When comparing Ball O'Clock vs Calendar, the Slant community recommends Calendar for most people. In the question“What are the best custom Android Wear watch faces?” Calendar is ranked 20th while Ball O'Clock is ranked 61st.
Ranked in these QuestionsQuestion Ranking
Colors can be customized as well as the battery indicator
The animations of balls dropping and rolling and the slides rotating makes it fun to watch
Pro New concept of telling time
The concept of telling time through ball stacking is a new concept for watchfaces that makes it unique
Pro GNOME Native integration
It has online accounts integration.
Pro Currently in active development
GNOME Calendar is improved with every release cycle of GNOME.
Calendar for GNOME aims to find the perfect balance between features and usability.
Con No support yet for WebCal
No support yet for WebCal, such as those offered by Facebook events.
A workaround exists. Since this application uses the same background services as Evolution, installing it and adding the WebCal calendars there, also adds them to GNOME Calendar.