Moleskine Journey allows you to add iCal formatted calendars such as iCal or Outlook calendars.
iCloud
It is currently possible to sync iCloud Calendar with Moleskine Journey by adding the calendar link to the available calendars:
1) Open the web client of iCloud Calendar at https://www.icloud.com/#calendar
2) Click on the share button on the calendar on the left, check the "Public calendar" checkbox and copy the link.
3) Go to Moleskine Journey Settings (click the gear icon on the bottom left), scroll down and click on Add calendar from url in the Third-party calendars section, then paste the link and save.
Now the iCloud events should be visible in the planner and the calendar should be listed in the Third-party calendars section and in the "Events" filter menu..
Outlook
To see Outlook Calendars on the Web App you should add the Outlook calendar ics link. Here's how to do it:
1) Navigate to https://outlook.live.com/owa/?path=/options/calendarpublishing, this page allows you to choose the sharing setting for your Outlook calendar:
2) Select the calendar you want to synchronize and click on the bottom-most Create button: two links will appear, copy the second one, near the ICS label.
3) Go to Moleskine Journey Settings (click the gear icon on the bottom left), scroll down and click on Add calendar from url in the Third-party calendars section, then paste the link and save (check the image at the step 3 for iCloud).
Now the Outlook events should be visible in the planner and the calendar should be listed in the Third-party calendars section and in the "Events" filter menu.
You could add up to 5 calendars.
The calendars/events are synchronized and updated every 6/8 hours from the original sources. This is a common policy for this type of synchronization used to avoid calendar source servers overload.