Eitri Bifrost is responsible for allowing developers to use navigation methods from Eitri-apps and giving Eitri-apps access to mobile native resources like GPS, Camera, and other hardware features.
Besides the default methods available on Eitri Bifrost, you can amplify the functions of your Eitri-apps by exposing custom methods from your app, so Eitri-apps in it can use them too.
To know more about the available methods, click here.