Ever sent a message and instantly regretted it?

Many apps let you delete messages after they've been sent—but by then, the recipient may have already seen it.

UNDO! works differently. UNDO! gives you a chance to cancel messages before they are sent.

No message.
No notification.
No chance for the recipient to see it.

⏳ How UNDO! Works

When you press the send button, UNDO! briefly delays the message for about 3 seconds. During this time, you can cancel the message by:

• Tapping the UNDO! button
• Tapping any letter on the keyboard

Opening menus, notifications, or navigating away will also cancel the message.

If no action is taken, the message will be sent after the delay. To send the message immediately, press the send button again during the delay.

📱 Works Across Many Apps

UNDO! is designed to work with many messaging and communication apps, including Google Messages, WhatsApp, Messenger, Instagram, and more.

Compatibility may vary depending on the app, device, and how messages are sent. To make sure UNDO! is active, press and hold the send button. If the UNDO! logo appears, UNDO! is active.

👑 UNDO! Premium

Upgrade to UNDO! Premium to unlock additional features:

✓ No Limits
Use UNDO! on as many apps as you want — all at the same time

✓ Give Yourself More Time
Adjust the delay from 3 to 5 seconds

🔒 Privacy & Accessibility

UNDO! uses Android’s Accessibility Service to detect when you press the send button and briefly delay message sending. UNDO! does not read, collect, store, or share your messages. UNDO! also does not collect any analytics or tracking data.

🚫 No Ads & No Account

UNDO! is ad-free and requires no sign-up. Just install and enable.

✅ Take Control of Your Messages

Mistakes happen. UNDO! gives you a second chance.