.app Domain Age Checker

Like .dev, .app is operated by Google Registry and is entirely HSTS-preloaded, forcing HTTPS across the whole TLD. It's aimed at mobile and web applications and has become a common choice for product landing pages and app marketing sites.

RDAP data is reliably available for .app domains. Because it launched in 2018, the TLD's overall age ceiling is low — even a domain registered near .app's public launch is only a few years old, so "long-established" looks different here than it does for .com or .org.

For product and app landing pages specifically, comparing an .app domain's registration date to the app's claimed launch date on its app store listing is a quick, useful cross-check when evaluating legitimacy.