Introducing .app domain names (and how to secure them) The .app live stream is from 2:17:08 to 2:55:45 and talks about the .app domain extension, browsers, free SSL certificates, Google Registry, HTTPS, HSTS, and whatnot. Get.app: What is .app? .app is a more secure domain for apps. From games to news to education, .app is the perfect home for your app. Be more secure. Your security is our priority. The .app top-level domain is included on the HSTS preload list, making HTTPS required on all connections to .app websites — no individual HSTS registration or configuration required. The result is built-in web security for you and your users. Get a memorable domain. The name says it all. Find a brand new .app name to match your company or product, so you can market your apps with a unique and relevant URL. Get discovered. You’re proud of all the work you put into your app. Now, with a unique domain, it’ll be easier for people to find your app. Disclosure: I do not own any .app domains today but tomorrow is a new day.