Tapkey is a cloud-based app that works like a virtual key ring. In combination with the digital cylinders and fittings from DOM, a digital access control system can be created in just a few minutes: Mounting the DOM Tapkey cylinder/fitting or similar into the door, downloading the Tapkey app from the Google or Apple Store and activating the account, connecting the account with the DOM Tapkey cylinder/fitting or similar. After that, all access rights can be organized from a smartphone.