Wealthbox does not currently have a 2-way sync with iOS/Apple calendars. We only have the iCal link, which will push Wealthbox events to display in the calendar it's linked to, but we cannot sync events back
You can export the calendar that you have in Wealthbox to your iPhone's calendar in a read-only format.
To do so, go into your Wealthbox account > Applications > iCal > "Settings". Here you will find a link which you may copy and paste into your iPhone. Click here to find your calendar web address.

On your iPhone:
1. Go to Settings > Passwords & Accounts
2. Choose "Add Account"
3. Select "Other"
4. Under Calendars, choose "Add Subscribed Calendar"
5. Paste the .ics address from the Wealthbox calendar into "Server"
Troubleshooting & FAQs
Q: Can I sync events from my iPhone calendar back to Wealthbox?
A: No. Wealthbox currently supports a one-way sync only. Events from Wealthbox can be displayed on your iPhone calendar, but changes made in your iPhone calendar will not sync back to Wealthbox.