This is the iOS SDK for SumUp that allows developers to access and integrate the functionality of SumUp with iOS applications and devices through Objective-C. SumUp is a service that allows users to accept and process credit card payments via mobile devices with the SumUp application.
CityDeals.com, local/national deal and discount finder, enables developers to access its deals database via the CityDeals API. Third party apps can feature daily deals and discounts, or provide a searchable interface of CityDeals.com's entire portfolio of discounts. CityDeals.com partners with retailers and service providers around the globe to provide an expansive offer of discounts applicable on a national scale or at the local level.
Groupon, which calls itself a "social commerce site," is one of many online services that help consumers pool their buying power to get great deals. However, few companies can share Groupon's experience of attracting $135 million dollars from the same venture capital funds that helped grow Facebook and Zynga. To help third-party developers and affiliate members get the word out about its daily specials, Groupon has released a publicly available API.