To whitelabel your Powr site to a custom domain, you can configure a CNAME on your DNS.
Custom Domain Names
A typical Powr website looks like this - http://justlol.unreel.me - where "justlol" is the unique site name.
If you own the domain www.justlolapp.com you can have it point to http://justlol.unreel.me
In your DNS, please create a CNAME record for your primary domain (justlolapp.com) like this:
www CNAME justlol.unreel.me
Example: GoDaddy Instructions - CNAME change
Step 1: Click on Manage DNS for your domain.
Step 2: Click on ADD or EDIT an existing CNAME record that has Name = "www".
Step 3: Add CNAME record
All Done! Now to go your admin on the CMS https://admin.unreel.me/admin/layout/general and update your Custom Domain.
Optional - Step 4
Add/Edit "A" record with Name = "@" with a naked redirect IP = 18.104.22.168
This will redirect anything "domain.com" to "www.domain.com"