Mailchimp Email SMS Marketing

To save me time and look more professional, I need a good supply of email templates to choose from. I also need it to integrate with my Shopify. MailChimp was a bit of a disappointment. I found their app did not allow me the customization I need and their templates were not what I thought they would be. So far Wix has them beat and that's the app I was wanting to switch from.