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Private LLM vs Lumo: catalog facts
Private LLM	Lumo
Paid One-time purchase with no subscription, shared across your Apple devices and Family…	Freemium Plans are not listed in the research; check Proton's site for current pricing.
macOS, iOS	Android, Web
Works fully offline after model download No account, tracking or logs	Zero-access encrypted chat history Provider states it does not track or record conversations
Apple devices only Closed source	Little public detail on models and limits in the research Requires trusting Proton's privacy claims
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 26, 2026

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