When comparing WAVE calendar vs Gboard - the Google Keyboard, the Slant community recommends Gboard - the Google Keyboard for most people. In the question“What are the best Material Design apps?” Gboard - the Google Keyboard is ranked 14th while WAVE calendar is ranked 28th. The most important reason people chose Gboard - the Google Keyboard is:
The Google Keyboard supports swiping along the keyboard to spell out whole words.
Specs
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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 Swipe support
The Google Keyboard supports swiping along the keyboard to spell out whole words.
Pro Learns preferred words
After using a gesture a few times and clicking the correct word, Google Keyboard learns that the gesture should result in the word you've manually selected as the correct word. Swype doesn't seem to learn this, so even after 100 times clicking 'this' instead of 'thesis', it still produces 'thesis', where Google Keyboard learns that you meant to say 'this'.
Pro Material Design
Google Keyboard has material design themes the user can skin the keyboard with.
Pro Swipe to punctuation
Hold down the key in the lower left hand corner and a keyboard if punctuation appears. Swipe over to the one you want, lift your finger, and the original keyboard pops back. It's very fast, and makes it much easier to spot the punctuation mark you want - instead of trying to squint at the secondary symbols in the keys.
Pro 100% free from Google
This keyboard is not a free trial nor will it hold back any new features to sell you a paid version. The keyboard is completely 100% free.
Pro Minimalistic design
While other keyboard options may be very functional, their visual design tends to differ from the rest of your Google device. The Google Keyboard was designed by Google and it looks like it.
Pro Fast, low memory usage
Alternative keyboards tend to suck up system resources, often making them nearly unusable on older phones. Google Keyboard is very quick to open when typing and the keys rarely lag.
Pro Has built-in Google search
The keyboard has button that allows searching Google straight from the keyboard, and use the search results in the currently used app.
Pro Emoji search
The GBoard has an emoji search that's very convenient, saves time looking for a specific one if you don't know/remember what category it's in.
Pro Dynamic floating preview
The dynamic floating preview appears while gesture typing. Most gesture keyboards only show the preview above the keyboard in the suggested corrections. The dynamic floating preview is great because it makes it easier to gesture type by keeping your eyes focused on what you are typing.
Pro Can use alternative layouts not just QWERTY
For those that are used to typing on a Dvorak keyboard or prefer not to need multiple key presses to access special symbols they can enable these as additional quick switch options. Using the English PC layout for example gives the user a number row.
Pro One-handed mode
Makes it easier to type with no more than a thumb.
Pro Suggestions don't get worse over time
Google keyboard does not promise to be as "smart" as other keyboards besides offering a personalized dictionary. Surprisingly this is actually a good thing for some because with many "smart" keyboards predictions and corrections actually worsen over time. With Google Keyboard the experience will remain constant because it requires you to manually "touch again to save" before it changes your personal dictionary. This prevents mistakes from becoming part of your personal dictionary.
Pro 120 languages support
Pro GIF support
Pro Cloud backup
Pro Pre-installed on most Android devices
Most Android devices have GBoard installed.
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 Typing is not always smooth
Sometimes typing lags.
Con Horrible Word Prediction
Unable to remember frequently used words.
Con Adds periods in random places and there is no way to disable it.
Con Lacks some features
Does not add contacts, does not save clipboard, and doesn't show the correct spelling of words or underline them, even though it's in settings.
Con Very little customization
Google Keyboard allows you to enable or disable
vibrate on keypress
sound on keypress
popup on keypress
double space period
These are pretty useful basic settings but most other keyboards offer more options. Google also allows you to edit the personal dictionary.
Con Restricted customization (few skins)
Con Terrible layout in landscape mode
Con Takes up a lot of storage
If you are using multiple languages and predictive text, the app can use up a lot of storage.
Con Prediction isn't as good as SwiftKey
Con Uses a lot of RAM

Con Symbol order is (slightly) different from full-sized QWERTY keyboard
Instead of the first four symbols being !@#$%^& (i.e. shift+1 through 7 on a QWERTY keyboard), they're @#$%&. This is fine if you know the symbols in your password, but if you're like me and you just hold the SHIFT key and type a long number, you'll have to consult a real keyboard to figure out your password.
Con Other languages not available in transliteration mode
Unlike Google Indic Keyboard where you can type by transliteration, compact, and handwriting, you only get the fixed layout for other languages.
Con It doesn't have arrow keys
Several times it is much better to navigate through a long text using arrow keys than scrolling and tapping the place where you want the cursor to be. SwiftKey has arrow keys (via an option), Gboard has not.
Con Google, via the keyboard app, might be collecting data on us that it then sells to third parties which in turn can use that data to influence us
