Frequently Asked Questions about Chuck

What is Chuck?

Chuck is the fast, fun, and efficient way to process your inbound email for iPhone, iPad, and iPod touches. Connect Chuck to your email (Gmail, Outlook, Yahoo!, AOL, iCloud, etc) and then Delete, Archive and Move messages by the hundreds or thousands. You can also star, unstar, and perform several other operations on any message or messages in your inbox.

What does Chuck cost?

Chuck is free.

Can I use Chuck with Apple iCloud email?

You can use Chuck with any,, or email address provided by Apple. However, Apple requires the use of app-specific passwords. To learn more about app-specific passwords with Chuck, go here. Once you have created a password for Chuck, just enter it when you add your iCloud account. You may use any of the supported iCloud domain names (,, when you enter your username.

Can I use Chuck with Microsoft Office 365?

Microsoft's IMAP servers for Office 365 are currently (January 2017) performing very slowly; on average about 4 minutes to connect to and load message headers. We don't find this to be an acceptable level of performance, so have disabled Office 365 support for now. We intend to re-enable it when speeds improve, or when we can add a special notice to properly set user expectations that it will be slow to load.

Can I use Chuck with a generic IMAP account?

Chuck supports IMAP, but only with specific service providers. This allows us to offer a high-quality user experience that we cannot guarantee with other providers. Most Chuck users use Gmail or Google's G-Suite Email. One option for older IMAP accounts is to migrate your mail to Gmail. Here are some tips on how to do that.

Is Chuck dependent on Mailstrom?

No. Chuck and Mailstrom (Chuck's sibling at 410 Labs) are totally independent from each other, but you can easily use both tools. Chuck can process up to 5,000 messages at once, while Mailstrom can handle millions at a time.

How does Chuck compare to Mailstrom?

The key dofference is that Chuck is an iPhone, iPad, and iPod touch app that does everything directly on the phone or tablet (no web site acting as an intermediary). So Chuck is faster, uses gestures very efficiently and has a different experience (like the immediate impact of filters on what you see). Mailstrom has never been optimized to perform as well on mobile. On the other hand, the iPhone, iPad, and iPod touch simply doesn't have all the capacity that the web service has, so for people with massive inboxes the web service can load their entire inbox, whereas Chuck can only load the most recent several thousand messages at a time. Also, Chuck doesn't do everything Mailstrom does, such as setting rules and blocking. In short, they are a nice complement.

How does Chuck interact with my email?

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.). You can also use Chuck to read individual email messages.

When you take actions with Chuck (such as deleting or moving messages to a different folder) Chuck instructs your email service to carry out those actions. You can usually see those changes reflected in your connected email service within seconds.