CoAlias allows you to add multiple custom domains to any bubble app. On top of that, you can add custom headers, routing, static files/pages, and redirects. It's the only solution that works in all browsers without any limitations.
In this guide, I will walk you through how to set up your first bubble app inside CoAlias. Follow these steps to setup:
Go to CoAlias.com and fill in your email. Click on continue.
Fill in the 6-digit code you received by email
Get your bubble domain from your bubble app (under settings => domain/email)
Fill in the bubble app host (without https://) on CoAlias.com and click on add.
Add your first custom domain
Adding domains can be done under the domain tab. You can add domains, subdomains, and wildcards to this tab.
Click on the plus button
Fill in your domain and click on add
Point your domain to 220.127.116.11 by creating an A record