Kaching Bundles App & Upsells

Kaching is by far the cleanest looking and operating volume upsell app. The app completely replaces the default variant selector for your theme. It also has plenty of customizations so that you can get the style dialed in. When you finish configuring everything, go through the purchasing process as a customer would and you'll see just how clean the customer journey becomes. Can't recommend enough for volume upsells!