Can I create multi product/volume bundles using your app? For example, I have socks, t-shirts and shoes on my store. I want a bundle that would allow me to say "buy any two and get 20% off", or "buy any three items and get 30% off."

1.) Best option (the recommended way):
Yes, you can easily create a multi-tier or a volume discount bundle. Just create a new bundle in the app and select the Volume discount type. This will allow you to set up different discounts for different tiers.

2.) Alternative option (use this only if the first option isn't what you want to achieve):
The other way to achieve this would be by creating multiple Mix & Match bundles, with different requirements for minimum number of products and different discounts.
Here is how you could do that:
Buy and two and get 20% off bundle:
  • Create a Mix&Match bundle with a selection of products which you want to allow your customers to pick them from,
  • set the minimum required number of products to 2 and also set the maximum allowed number of products to 2,
  • set the discount to 20%
  • set the priority of the bundle to a higher number (e.g. 15) than the priority of the bundle which requires more products
Buy and three items and get 30% off bundle:
  • Create a Mix&Match bundle with a selection of products which you want to allow your customers to pick them from,
  • set the minimum required number of products to 3 and also set the maximum allowed number of products to 3,
  • set the discount to 30%
  • set the priority of the bundle to a lower number (higher priority) (e.g. 10) than the priority of the bundle which requires less products

If your bundles include a lot of products, then it might be a good idea to hide the widget for this bundle (can be configured in bundle settings) and promote the bundle via banners or somehow else. The customers will still get a discount, no matter how they add the products to the cart.