An Application is a group of several API keys, which are credentials identifying and authenticating your own application in the IndoorAtlas platform. You can manage them in https://app.indooratlas.com/apps
You should always create a new Application and API key for each new application you deploy with IndoorAtlas, in order to manage distribution and provide additional account security for your usage.
API keys have two possible scopes: “SDK” and “Positioning API”, which can be used to restrict API key permissions. It is good to adhere to the principle of least privilege: if you do not need Positioning REST API in an application, then do not enable the Positioning API scope for the API key used in that app.