As of August 8, 2019 the add-ons except Extended Views are only available in Timely Web App bundles." The timely web app can be a hyperlink to Journey pricing page.
Add-ons are installed in the same as any other WordPress plugin, including the Core Calendar.
Step 1: Download and Activate
Browse the Timely Add-on section, to find the Add-ons you like, download, upload and then activate.
Step 2: Configure Settings for you new Add-on
Some Add-ons require further settings. Navigate to Events > Settings > Add-ons and select the feature from the drop-down menu.
Get some support
If you’re still not sure what to do, or you’re having troubles, please create a support ticket by logging into your Timely account and clicking on the "Get Help" button.