How to Turn Off Spell Check on iPhone: A Complete Guide

Autocorrect and spell check are two of the most polarizing features on any iPhone. When they work, you barely notice them. When they don't, they silently mangle your messages before you hit send. Whether you're a developer typing code, a bilingual texter switching languages mid-conversation, or just someone tired of "ducking" corrections, knowing how to control spell check on your iPhone is genuinely useful.

What Spell Check and Autocorrect Actually Do on iPhone

Before diving into the steps, it helps to understand what you're actually turning off — because spell check and autocorrect are related but distinct features on iOS.

• Spell Check underlines words it doesn't recognize in red, flagging potential misspellings without changing anything automatically.
• Autocorrect goes further — it replaces what you type with what it thinks you meant, often without waiting for your confirmation.
• Predictive text (the word suggestions that appear above the keyboard) is a third layer, separate from both.

All three live in the same settings area, but they can be toggled independently. This matters because many people want to keep one while disabling another.

How to Turn Off Spell Check on iPhone 📱

The steps are straightforward and apply across modern iOS versions (iOS 16, 17, and later):

1. Open the Settings app
2. Scroll down and tap General
3. Tap Keyboard
4. Under the "All Keyboards" section, locate the Check Spelling toggle
5. Tap it to turn it off — the toggle will go from green to grey

That's it. The red underlines will stop appearing immediately across all apps that use the native iOS keyboard.

Turning Off Autocorrect (If That's What You're Actually After)

On the same Settings → General → Keyboard screen, you'll find the Auto-Correction toggle directly above or near Check Spelling. Many people who think spell check is the problem actually find autocorrect more disruptive — since autocorrect changes what you wrote, while spell check only flags it.

You can disable either or both independently.

Turning Off Predictive Text

Also on the same screen: the Predictive Text toggle. Disabling this removes the word suggestion bar that appears above the keyboard. Some users find this cleaner; others rely on it heavily for speed.

Why the Same Setting Behaves Differently Across Apps

One thing that catches people off guard: not all apps use Apple's native keyboard engine equally. Apps like Notes, Messages, and Mail fully respect iOS-level spell check settings. But some third-party apps — particularly those with custom text fields — handle spell check internally and may ignore your system-level setting entirely.

If you turn off spell check in Settings but still see red underlines in a specific app, that app is running its own spell check independently of iOS. In those cases, you'd need to look inside the app's own settings.

Third-Party Keyboards Add Another Variable

If you're using a third-party keyboard — like Gboard, SwiftKey, or Grammarly — your iOS spell check settings may not apply at all. These keyboards bring their own autocorrect and spell check engines, configured separately from Apple's system settings.

To control spell check behavior on a third-party keyboard, you'd typically:

• Open that keyboard's settings (often accessible through its own app)
• Look for autocorrect, spell check, or text correction options within the keyboard's preferences

This is a common source of confusion: someone disables spell check in iOS Settings, then wonders why corrections are still happening — because their active keyboard isn't Apple's.

Language Settings Can Affect Spell Check Behavior

If you type in multiple languages, iOS spell check references the languages you've added to your keyboard. Words from a language not in your active list may get flagged as misspellings even when they're perfectly correct.

Going to Settings → General → Keyboard → Keyboards shows which language keyboards are installed. Adding a second language keyboard (like Spanish or French) tells spell check to recognize vocabulary from both, which can reduce false positives without requiring you to turn spell check off entirely.

This is worth considering before fully disabling spell check — sometimes the issue isn't spell check itself, but a mismatch between the language you're typing and the language your keyboard expects.

When Disabling Spell Check Makes Sense — and When It Doesn't

Situations where turning off spell check is reasonable:

• You frequently type technical terms, code snippets, product names, or industry jargon
• You're bilingual and constantly switch between languages mid-message
• You find the red underlines visually distracting and prefer to self-edit
• You use a specialized input method or accessibility setup

Situations where keeping it on is worth reconsidering:

• You type quickly and rely on visual flags to catch errors before sending
• You're writing longer-form content like emails or documents where accuracy matters
• You're a new or infrequent texter who benefits from the safety net

The same setting produces meaningfully different experiences depending on how you actually use your iPhone — what apps you live in, what languages you switch between, whether you use Apple's keyboard or a third-party one, and how much you notice (or care about) correction suggestions in the first place. Those variables don't have a universal right answer.