I have been searching for a good newsletter signup plugin for wordpress for a while now. I have tried about 10 plugins that worked but didn’t make the job easy. Then I found this plugin!
I found a plugin called Bloom by elegant themes
This plugin is by far the best newsletter and subscribe plugin for wordpress I have found! You can easily add opt-in forms to your website and this plugin is also responsive! The control you can have over this plugin is amazing, you can set it to only show once per session and only pop up when the user scrolls, pop up when the user is inactive and pop up after a purchase! I highly recommend you buy this plugin today!