You must be a domain administrator in order to install the service on google apps. The process takes 1 minute.
I-Install the application
1. Install the application Evercontact from the G Suite Marketplace here.
2. Provide your domain's Google authorizations:
3. a- Add as many of your domain users as you'd like.
b- In your domain dashboard, you'll be able to access Evercontact as you see below:
c- Launch Evercontact:
And as long as you didn't miss any steps, you should be all set.
For more information, check out our Evercontact for Google Apps documentation.