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No. Brevity connects directly to your mail provider (Gmail / iCloud / Outlook / IMAP) using standard protocols over TLS. There is no Brevity-operated backend in the loop. The AI summary and reply generation run on your device using Apple's Foundation Models — not on a cloud LLM.
Brevity has zero ongoing operating costs, so we can't subsidize multi-account use indefinitely. One account is free forever with no watermark, no inbox cap, and no ads. Pro adds two more accounts; Pro+ removes the limit.
Settings → Mail accounts → Add Account → Gmail. A Google-hosted sign-in sheet appears (provided by Apple's ASWebAuthenticationSession). Brevity never sees your Google password.
iCloud Mail with two-factor authentication (the default) requires an app-specific password. Go to appleid.apple.com → Sign-In and Security → App-Specific Passwords → Generate, then paste it into Brevity's iCloud setup screen.
The on-device language model (Apple Foundation Models) is available on iOS 26+ on devices with sufficient memory. On iOS 17 through 25, Brevity falls back to deterministic extractive summarization using Apple's NaturalLanguage framework — still on-device, still free.
Settings → [your Apple ID at the top] → Subscriptions → Brevity → Cancel Subscription. Apple — not Brevity — manages the cancellation flow. Cancelling stops the next renewal; you keep Pro / Pro+ until the end of the current paid period.
Tap "Restore Purchases" at the bottom of any paywall screen, or Settings → Brevity Pro → Restore Purchases. You must be signed in to the same Apple ID that purchased the subscription.
Settings → Tracker shield → switch to "Ask each message" or "Allow all". You can also tap the small "load images" link on a specific message to whitelist it for that one render.
Gmail's real-time push API requires a backend service that Brevity (by design) does not operate. We rely on IMAP IDLE while the app is open, plus iOS background refresh every ~15 minutes when backgrounded. If you need instant Gmail push, use Apple Mail in parallel; iOS will fire the notification.
On iOS 26+: Apple's on-device Foundation Models with a deterministic prompt asking for a 3-sentence summary, no preamble, no invented facts. On older iOS: NaturalLanguage word embeddings + TextRank sentence ranking pick the 3 most central sentences from the message. Both paths run entirely on your phone.