When comparing Chron vs Calendar, the Slant community recommends Chron for most people. In the question“What are the best custom Android Wear watch faces?” Chron is ranked 8th while Calendar is ranked 20th. The most important reason people chose Chron is:
A Tron-like watchface with neon blues and yellows.
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Pros
Pro Detailed cyberpunk aesthetic
A Tron-like watchface with neon blues and yellows.
Pro Dimmed mode
Pro Circular display ready
The developers have confirmed that the watchface is ready for circular displays and promises to adjust it for Moto 360 as needed when they get their hands on the device.
Pro Shows date
Pro GNOME native integration
Pro Currently in active development
GNOME Calendar is improved with every release cycle of GNOME.
Pro Simplicity
Calendar for GNOME aims to find the perfect balance between features and usability.
Pro Synchronisation
It has online accounts integration.
Cons
Con Not compatible with LG G Watch W100
Connection to the phone gets lost while using this watch face on LG G Watch W100.
Con Cannot print
Con Extremely buggy
Con Poor interoperability with online calendars
Does not connect to Fastmail.
Con Far too simple
Con FAR too tied into the GNOME infrastructure
The UI and configuration presume you are running GNOME, and has the ugliness of a GNOME application. Configuration, as is usual for any GNOME application, is pretty much nonesistent.
Con Can't read 'all-day' events with dark theme
Text is white on light blue with dark themes. The workaround: assign all-day events to just one hour.
Con Can't import ics files
Con Continues to pop-up reminders that are turned off and they cannot ever be removed
The GNOME Calendar displays pop-ups from an old Google Calendar that was used. That Google Calendar has long since been removed from GNOME, and even with the notifications turned off on the GNOME Calendar, the pop-ups still happen.
Con Incorrect appointment times when importing .ics calendars
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.