The What3Words iOS SDK by What3Words allows to communicate with the API to implement addresses, location, and localization features into applications. Resources explain how to run the SDK step by step.
Geo APIs are popular in today's mobile, ever-connected world. It's hard to find an oft-used app without mapping functionality of some sort. While the likes of Google Maps and other services have popular APIs, there is a visible lack of standardization in geocoding that the OGC seeks to remedy.