Does .app exist?
Yes. .app is a real top-level domain, live in the IANA root zone right now.
We have opinions about it, too — read the full .app review. In one line: The obvious home for an app. Clear, cheap, HTTPS-enforced — just remember it promises an app, not a company.
Try to register a .app domain
This answer is generated from the live IANA root zone list, not from vibes. If the DNS changes, this page changes.