Looking for an Android app the operates as a POS system for my BigCommerce store. Big commerce uses a RESTful API and using the API, Products could be downloaded and made available to add to cart using Plus/Minus buttons. Tax rate can be determined via GPS. And the checkout will use the PayAnywhere API to send Credit card info for processing. Final step is capture user email and send receipt. I want an app that mimics GoPayment with the difference being that my products are made available from my website and when a sale is made, the inventory is updated accordingly.