PRICE PAGE APP

Does anyone know how to create this type of pricing page app? I’m interested in having a certain type of functionality.

The following link has exactly what we’re looking for with the slider moving up and down as the different prices change with the number of contacts with different plans etc.

Please take a look and let me know if you have an experience with this sort of app. If you have any sample site with similar work that would be great if you can send me that link as well and give me a ball park idea on cost, thanks in advance.

https://www.activecampaign.com/pricing/