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DNS Hero vs DNSChecker: catalog facts
DNS Hero	DNSChecker
Free Free and open source under GPL-3.0-only.	Free Free to use in the browser.
Android	Web
Displays common DNS record types Checks domain health	Shows results from many resolvers in different countries at once Covers a wide range of record types, including DNSSEC records
Uses the Zone Vision API by DNSimple	Shows what resolvers return but does not diagnose configuration errors
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.