When comparing WAVE calendar vs Annual View, the Slant community recommends WAVE calendar for most people. In the question“What are the best calendar apps for Android?” WAVE calendar is ranked 9th while Annual View is ranked 15th. The most important reason people chose WAVE calendar is:
Available in English, Dutch, Spanish, Swedish, Italian, Portuguese, German, Chinese, and Russian.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Available in 10 languages
Available in English, Dutch, Spanish, Swedish, Italian, Portuguese, German, Chinese, and Russian.
Pro Integrates with Google Maps for directions
If a location to an event is added, the app will show a map and allow pulling up Google Maps for directions.
Pro Built-in task manager that can integrates with Google Tasks
Wave allows creating local and Google Tasks to-do items that can be synced across devices and color-coded.
Pro Has day and week, month, list and 2 agenda views
The app has day, week, week-agenda, month, month-agenda and list views.
Day, 3-day and week views split up the days horizontally and hours vertically.
Week agenda splits the screen in 6 equal parts - 5 parts for work days, sixth for weekend. Double-tapping a day will open a list of events for that day. From here swiping left and right allows moving between days.
Month view splits the screen in half with one half displaying a typical month view with color-coded dots next to dates to show which days have events and the other a list of events for the selected day.
Month agenda view lays out all days in a grid and displays all event for the day.
The list view is actually the closest to a typical agenda view despite the name. The difference here is that there are two modes of showing that information - default and detailed. The default mode displays date, time, event name and location (if available) and the detailed mode displays extra information such as what calendar is the event part of, who's attending, notes, etc.
Pro Integrates with Wave Scheduler for event planning
Another app on offer from the publisher is WAVE Scheduler, which integrates into WAVE Calendar for easy event planning.
Pro Color-coding for events and calendars
The app will color-code different calendars in different colors as well as allow selecting a different color for each event.
Pro Includes a store for purchasing various public calendars
The app has a store for sports, stock exchange, holiday, religion and other calendars.

Pro Semester view for displaying 6 months on the same screen

Pro Aligned day number view
This new view aligns months according to days numbers.
Pro Ad-supported, full free version available
A full free version is available now.
Pro Zoom
Users can zoom in on the calendar to get a less noisy view of events.

Pro A comprehensive overview of all events in a given year
The calendar app lays out all events of a given year in a single view with months on x axis and days on y axis. The events can be identified by their color codes and assigned letters.
Cons
Con Some basic features require signing up
Paid features include the ability to add attachments and travel time to events and see local weather in calendar.
Con Inconsistent design
There's different branding in different places (Still has e-cal branding in some places). Sometimes looking at an event requires tapping twice while most of the time it's once, a horizontal list of items looks differently based on the views it's accessed through, etc.
Con No natural language input support
Con Noisy UI
With such information density and small scale of each interface element, it can be hard to get a sense of what information is presented.
