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Nine vs Spark Mail: catalog facts
Nine	Spark Mail
Paid Pricing is not listed on the homepage; check the store listing for current terms.	Freemium Free for individuals; paid plans add AI features and team tools.
Android, iOS	Windows, macOS, Android, iOS
Direct Push sync with Exchange ActiveSync servers Mail, calendar, contacts, tasks and notes in one app	Automatic inbox categorization cuts down on manual sorting AI-drafted replies can speed up routine email responses
IMAP accounts sync email only Pricing not stated on the homepage	AI and team features are gated behind a paid plan Some categorization requires manual correction over time
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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