WhatsApp Chat & Abandoned Cart is an app from a well-established team of Shopify app providers, with many well-reviewed and highly rated apps covering social media, marketing, upselling/cross-selling, image editing, and more.

This one is free to install and there are no paid plans. However, automated messages are charged at rates depending on the location.

Beginners need not worry—it’s designed to be very easy to install and use.