Klink Delivery provides with an opportunity to choose from thousand of alcohol drinks by categories and filter, then pay for it through the app and just wait for the doorbell to ring. We've developed this solution both for iOS and Android platforms.
iOS: MapKit, CoreLocation, CoreAnimation, StoreKit, UIKit, CoreDate. AF Networking
Android: Butterknife, In-app-billing, REST API, Google Maps API, Android SDK, Auth, RecyclerView