Auto-correct and predictive text can save time, but they also change words you meant to type. You can switch them off in the keyboard settings.

Android (Gboard)

1. Open the keyboard while typing, then tap the settings icon or the Gboard menu.
2. Tap Text correction.
3. Switch off Auto-correct and Show suggestion strip or Next-word suggestions, whichever you want to stop.

Keyboard names and menus vary by brand. Look for Keyboard settings in the phone’s main Settings if you cannot find them.

iPhone

1. Open Settings, then General, then Keyboard.
2. Switch off Auto-Correction to stop automatic word changes.
3. Switch off Predictive to hide the word suggestions above the keyboard.

Keep some of it

If you type in a second language, auto-correct can help more than it hurts. Try turning off one setting at a time, so you can see which one causes the trouble.