WhenWorks integrates with Google Calendar through the built-in Calendar app on iOS. Therefore, in order for WhenWorks to access your Google Calendar, you must configure the Calendar app on iOS to sync with Google Calendar.
Here is how to configure Google Calendar syncing on your iOS device.
Open the Settings app and tap Accounts & Passwords > Accounts > Add Account > Google. Then enter your login details.
On the next screen make sure that Calendars is enabled.
Once your iOS device is syncing with Google Calendar, WhenWorks will be able to access your real-time availability and add appointments to your Google Calendar.
If you are sharing calendars with others on Google, the shared calendars should show up in WhenWorks in Settings > Calendars Affecting Availability.
If some of your Google Calendars are not appearing in the screen above, you may need to enable them by going to Google Calendar Sync Settings in your web browser and selecting the calendars you want to sync to your iOS device.