6 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
About the .app top-level domain: registry operator, type (generic, country-code, sponsored), IANA/RDAP details, WHOIS server, creation date, DNSSEC signing status and the registry's nameservers. Registration research and...
A record of app.<domain>: looks up the app host under the domain you give (A via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumerating sub...
AAAA record of app.<domain>: looks up the app host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumerati...
CNAME record of app.<domain>: looks up the app host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumera...
TXT record of app.<domain>: looks up the app host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumerating...
Web app manifest reader: finds and parses a site's manifest.json / site.webmanifest (name, short name, description, start URL, display mode, theme and background colours, icons). Tells you if a site is an installable PWA...