We have a demo store where you can check out how the app works. Demo store is:
You can add different products to cart from the demo store to see how the offer works etc.
If you face any problems in installing or using the app then you just need to add firstname.lastname@example.org as staff member of your store and email us at email@example.com explaining the issues and our team will try to sort out the issues for you.
Our services include setup, development, design, illustration, custom apps. We've worked with hundreds of stores. Check our shopify expert profile here
You can also email us at