Support & FAQ

Chuck is a full email client for iPhone with batch processing superpowers. Connect your email accounts, then delete, archive, and move messages by the hundreds or thousands with simple swipe gestures. Chuck is free to download with support for up to 10,000 messages — no credit card required.

Chuck is free to download and use. The free tier includes 1 email account, up to 10,000 messages, and a daily processing quota — no credit card required.

Chuck Pro unlocks unlimited accounts, unlimited messages, and advanced features for $5.99/month or $49/year.

Chuck Free connects one email account with up to 10,000 messages and a monthly processing quota. You get batch delete, archive, move, and per-message unsubscribe.

Chuck Pro unlocks unlimited email accounts, unlimited message processing, no monthly limits, Global Unsubscribe, AI cleanup suggestions, custom signatures, sender blocking, folder cleanup, advanced filters, and smart notifications.

When you connect your email to Chuck, Chuck downloads certain information about your recent email messages including the subject line and other metadata (sender, date, subject, etc.). All processing happens on your device — nothing leaves your phone.

Chuck Pro's on-device AI analyzes your email patterns to surface the messages you're most likely to delete, archive, or act on. This makes inbox triage lightning fast — nothing else comes close. All AI processing happens entirely on your device, so your email data never leaves your phone.

Access the tutorial through Settings in Chuck by selecting the three-bar menu, choosing "Settings and Help," and scrolling to select "Tutorial."

Chuck can filter your email display by read/unread status, attachments, and other criteria. You can also search by sender, subject, and keywords using the "Find messages" field available in Chuck tabs.

Use Unsubscribe in Chuck to remove your email address from mailing lists. Tap the unsubscribe icon in the lower right corner of Chuck to unsubscribe from the currently selected sender or mailing list.

Yes. Chuck sends individual notifications for new messages. Chuck Pro users can also disable notifications for automated messages to reduce noise.

Yes. From your Home Screen, touch and hold an empty area, tap the "+" button, find Chuck, select a widget size, and confirm.

The icons in Chuck represent: Compose (create messages), Archive, Delete, Move to Inbox, More actions, Multi-select, Filters, Unsubscribe, Reply, and Share.

Yes. Chuck works with iCloud.com, mac.com, and me.com addresses. Apple does not offer OAuth for third-party mail apps, so iCloud accounts use an app-specific password — a separate password you generate just for Chuck. Your main Apple ID password is never shared with Chuck, and you can revoke the app-specific password from your Apple ID at any time.

Sign in at appleid.apple.com, go to Sign-In and Security, choose App-Specific Passwords, and generate one labeled for Chuck. Apple shows you the generated password once — copy it, then in Chuck go to "Settings and Help," select "Add New Account," enter your iCloud email, tap "Sign In with iCloud," and paste the app-specific password.

You can revoke the password from the same Apple ID page at any time. Apple's full instructions are at support.apple.com/102654.

Chuck uses Microsoft OAuth for outlook.com, hotmail.com, live.com, and msn.com accounts — you sign in directly with Microsoft and Chuck never sees your password. Go to "Settings and Help," select "Add New Account" and then "Continue with Microsoft" to follow the authentication steps.

Office 365 and custom-domain Microsoft 365 accounts also use Microsoft OAuth by default. Go to "Settings and Help," select "Add New Account" and then "Continue with Microsoft" to follow the authentication steps.

GoDaddy-hosted Microsoft 365 accounts: When Microsoft asks whether this is a "personal," "school," or "work" account, choose "work" — GoDaddy acts as the IT department. You'll then be routed through GoDaddy's gateway to grant Chuck access.

If your IT administrator has disabled OAuth for third-party clients, Chuck will fall back to asking for an app password issued by your tenant. Most users won't see this; if you do, contact your IT admin for the correct credentials.

AOL, Verizon, and Yahoo Mail all sign in through Yahoo's OAuth flow — Verizon migrated its email service to AOL/Yahoo years ago, and AOL is owned by Yahoo. Go to "Settings and Help," select "Add New Account," enter your email address, and complete sign-in on the Yahoo/AOL authentication screen. No password is shared with Chuck.

Yes. Chuck includes autoconfiguration for dozens of common email providers (Comcast/Xfinity, Fastmail, Mail.com, GMX, Zoho, Hushmail, and more) and supports any standard IMAP email service. For providers without OAuth support, Chuck signs in with your IMAP password.

Tap the three-bar menu, scroll to the bottom, select "Settings and Help," and choose "Add New Account."

After you take an action in Chuck there is an immediate "Undo" option that appears in the lower right corner in blue.

For older actions, access the menu, find your email account, select "Undo Actions," and choose "Undo" next to the action you wish to reverse.

Open Chuck, go to "Settings and Help," and select "Report a Bug." Include a description of the problem with your report.

If you're using Chuck Free, simply delete the app. If you're a Chuck Pro subscriber, cancel through your iPhone's Settings > Apple ID > Subscriptions, following Apple's standard subscription cancellation process.

Tap the top-left menu button, go to the Chuck Pro screen, and tap "Restore Purchases" if you've recently reinstalled or updated.

Chuck sources avatars from three places: your iOS address book, gravatar.com, and our database of logos for tens of thousands of popular sender domains. There's no Chuck-side avatar upload — update the photo in your iPhone Contacts app and it will flow through to Chuck.

Chuck and Mailstrom are sibling products from 410 Labs, but they are completely independent. Chuck operates on-device for speed and gesture efficiency, while Mailstrom runs in the cloud and handles larger inboxes. You can use both, and Chuck Pro is included with Mailstrom Basic, Plus, and Pro subscriptions.