iOS tip: Oops! 4 e-mail apps that let you "undo" a sent messageSo, you just tapped “Send” on an important e-mail message—and the moment you did, you realized that you sent the message to the wrong person, or you forgot to attach a critical file, or you CC’d the entire planet, or you simply want a do-over.

Unfortunately, there are no mulligans with the standard Mail app for iOS. Once you tap “Send,” your email is on its way, for better or worse.

The good news is that there are several alternative iOS mail apps with an “undo send” feature. The way it works is simple: once you tap the “Send” button, you’ll get anywhere between five and 10 seconds to change your mind, perfect for saving yourself from e-mail embarrassment.

Read on for four top iOS mail apps that’ll let you undo a sent message, starting with:

Gmail for iOS undo send

Gmail for iOS gives you about five seconds to “undo” a sent message.

Gmail (free)

Google’s top-notch mail client just got a big update for iOS, adding features like instant search results and swipe-to-archive and swipe-to-delete gestures. You can also do nifty things like “mute” annoying e-mail threads, create custom notifications for specific message labels, and set up an out-of-office message directly from your iPhone or iPad.

Best of all, though, the new Gmail app for iOS adds an “undo send” feature. As soon as you tap the “Send” button, an “Undo” prompt will appear at the bottom of the screen, giving you a few seconds to yank the message from Gmail’s outbox.

Pretty nice, but there are downsides to Gmail, including the fact that the iOS version only works with Gmail accounts—meaning, for example, you can’t use it to check your iCloud account. The lack of a universal inbox is also a bummer.

Grab Gmail for iOS from the App Store

The Airmail app for iOS lets you choose how long you have to “undo” a send.

Airmail ($4.99)

No, it’s not free, but Airmail’s appealing mail app boasts a series of features missing in Gmail for iOS, including a universal inbox, a ton of customization options, and the ability to juggle several different types of mail accounts (including iCloud). Also nice: a “snooze” feature for messages you’d rather deal with later.

And yes, there’s an “undo send” feature, just like the Gmail app for iOS, except with Airmail, you can decide how many seconds you get to tap “undo.”

Just tap the main menu button in the top-left corner of the screen, tap Settings, scroll down to the Composer heading, tap Undo Send, then make your pick—either five seconds, 10 seconds, or “off” altogether.

Grab Airmail from the App Store

Spark for iOS undo delete message

Like both Gmail and Airmail, Spark will let you “undo” a deleted message as well as a sent one.

Spark (free)

A relative newcomer when it comes to third-party iOS mail apps, Spark comes to the table with a “smart” inbox that (if you let it) will sort through incoming messages and highlight only the important ones.

Like Airmail, Spark has a universal inbox and the ability to “snooze” a message, and it even has “quick reply” buttons that let you reply with a “thanks” or a “like” with a single tap.

Spark also lets you “undo” a sent message, giving you about five seconds to tap “undo” once you’ve hit “Send.”

Grab Spark from the App Store

Inbox by Gmail for iOS undo send

Inbox’s “undo send” feature works just like Gmail’s.

Inbox by Gmail (free)

Google’s nifty Gmail alternative comes with its own “smart” inbox similar to Spark’s, complete with filters that automatically sort low-priority messages into “bundles” like Promos, Purchases, Social, and Forums. As with Airmail and Spark, you can snooze messages, as well as “pin” important ones and create reminders out of others.

Inbox’s “undo send” feature works exactly like Gmail’s: after you tap Send, you get about five seconds to tap Undo. Sadly, Inbox shares two of Gmail’s biggest downsides—namely, there’s no universal inbox, nor is there support for anything but Google accounts.

Grab Inbox by Gmail from the App Store

Bonus tip

In addition to their respective “undo send” features, each of the iOS mail clients listed here will let you “undo” a trashed message, handy for retrieving an e-mail you deleted by accident.

Click here for more iOS tips!

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