How do I set up Apple app-specific passwords?

To use the calendar sync with your Apple calendar, you need to create a special "app-specific password" inside of your Apple account. 

Here are the steps:

1. Log in to your Apple account here
2. Make sure you have turned on either two-step verification or two-factor authentication (most people have this "on" by default)
3. In the Security section, click "Generate Password" under the app-specific passwords section
   
4. Type "Bookedin" to give a name for your app-specific password, then click "Create"
5. Now copy the password, and leave this tab open until you've completed the next step.
6. Now open a new browser tab, log in to your Bookedin account 
7. Go to the "Settings > Calendar Sync" page (top menu)
8. Click "Add New Calendar Sync" button
9. On the sync setup screen, choose the iCloud option
10. Sign in using your AppleID email address, and the app specific password you setup in step 5 above.
11. You're done! Now your Apple calendar will sync automatically to your bookedin calendar.