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Nostur vs Iris: catalog facts
Nostur	Iris
Free Available from the App Store or as a direct download, with published source.	Free The research shows no pricing for using the web client.
macOS, iOS	Web
Multiple accounts and a guest mode Posts stored on device with export	Runs in the browser with nothing to install Relay list you can edit, with discovered relays
Apple platforms only Zaps require a Lightning wallet	Content and reach depend on the relays you connect to Nostr has a smaller audience than mainstream networks
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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