iPhone Undo: Tap with 3 Fingers to Instantly Undo (No Retyping)

\n\n## How to do it

1. Open any app with a text field (Notes, Mail, Calendar, etc.).
2. Tap the screen with 3 fingers at the same time.
3. A small menu appears at the top: Undo, Redo, Cut, Copy, and Paste.
4. Tap Undo — done.

Alternative: Shake

You can also shake your iPhone — iOS will ask if you want to undo the last action.

Toggle the shake gesture under Settings → Accessibility → Touch → Shake to Undo.

Why this helps

iOS has system-wide Undo/Redo built in. The 3-finger gesture surfaces this hidden feature without digging through menus. Especially handy when you accidentally delete a whole paragraph.