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Inbox Zero is available for iOS and Android. The mobile apps work with the same Inbox Zero account and connected Gmail or Outlook accounts you use on the web.

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Install and sign in

  1. Open getinboxzero.com/app.
  2. Select App Store or Google Play.
  3. Install Inbox Zero and sign in with your existing account. If you are new, create an account and connect Gmail or Outlook during setup.
The apps are free to download. Features that require a paid Inbox Zero plan on the web keep the same plan requirement on mobile.

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What you can do

The current mobile experience supports core inbox and assistant workflows, including:
  • Chat with the AI assistant to ask about email, get summaries, and prepare replies.
  • Read conversations and send new messages or replies.
  • Review messages needing a reply and common categories such as Newsletters, Promotions, and Notifications.
  • Work across your connected inboxes from the combined inbox view.
  • Archive, restore, move to trash, or undo those actions for individual or selected threads.
  • Create a rule from a plain-language prompt or configure it manually, then edit, enable, disable, or delete rules.
Some account administration and advanced configuration remain easier or available only in the web app. If a setting is not present on mobile, open Inbox Zero in a desktop browser.

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Multiple inboxes

The combined inbox loads eligible sections from every connected email account. If one provider is temporarily unavailable, the app can still show results from other accounts and indicate that the affected account is incomplete. Actions are scoped to the account that owns each thread. The service verifies account ownership before changing mail, including bulk archive operations.

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Safety

  • Review AI-generated drafts and recipients before sending.
  • Archive and trash are different: trash moves a thread to Gmail Trash or Outlook Deleted Items; it is not an immediate permanent deletion.
  • Use your phone’s passcode or biometric lock and keep the operating system updated.
  • If a phone is lost, secure the device through Apple or Google and review your Inbox Zero and email-account sessions.

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Troubleshooting

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Sign-in returns to the browser instead of the app

Update the app and retry from its sign-in screen. If the callback still does not return, close the browser tab, reopen the app, and start a fresh sign-in. A sign-in authorization code is short-lived and cannot be reused.

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One connected account is empty

Open the account on the web and confirm that its Gmail or Outlook connection is active. Then refresh the mobile view. Other accounts may continue working while one account is disconnected or experiencing a provider error.

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A web feature is missing on mobile

Use the web app for the complete settings and administration surface. Mobile and web share the same account, so saved changes will apply to supported mobile workflows.