Exfoliante

Excelent! Superb support team also! There are some features that I feel are missing, but most of them are announced that will be available soon in the UI... I'm sooo looking forward for them

The support team is awesome! The app is super customizable. In fact I think that more Shopify apps should do what these guys are doing regarding emails customization

Nice! Double opt-in pop ups would be great! I have heard they increase convertion.