AI Keyboard for iPhone: How It Works and What Full Access Means

What is an AI keyboard?

An AI keyboard can also fix grammar, rewrite a sentence, translate it, or shift the tone. None of that happens automatically, though. You pick the text, you pick the action. Think writing assistant, not background text monitor. Checker works the same way: AI only runs when you ask for it.

How iOS keyboard extensions work

Worth knowing the mechanics first. Apple lets developers build custom keyboards, but they talk to the current text field through a locked-down interface, not the app itself. Every keyboard plays by the same rules. In practice: install the app, turn the keyboard on in Settings, switch to it with the globe button whenever you want AI help.

• Install the Checker app
• Enable the keyboard in iOS Settings
• Open a supported text field
• Switch keyboards using the globe button
• Choose an AI action only when needed

Why does an AI keyboard require Full Access?

Every third-party keyboard starts with zero internet access. Apple built it that way. So the moment a keyboard needs to talk to an online AI model, it needs Full Access. That permission lets it send the text you chose and get the result back. It does not mean every keystroke gets shipped off somewhere.

Privacy considerations

If a keyboard asks for Full Access, you should know why, and what happens to your data. A keyboard worth trusting spells out what gets sent, when, and for what. With Checker, nothing moves until you pick an action. General rule either way: never hand passwords, 2FA codes, payment info, or anything sensitive to an online AI service.

Why some apps do not allow AI keyboards

Common question: why does the AI keyboard just vanish sometimes? Two reasons. Apple force-switches to its own keyboard on certain sensitive fields. And some apps flat-out block third-party keyboards. Either way, that's iOS or the app calling the shots, not the AI keyboard.

• Secure password fields
• Phone number keypads
• Applications that disable third-party keyboards
• Fields with limited surrounding text access

Read from Input and Copied Text

A keyboard extension doesn't get to see everything on screen. iOS only exposes a small window of text around the cursor. Checker works with that through Read from Input. When that's not enough, copy the text and use Copied Text instead — a manual fallback. Depending on your settings, iOS may prompt you for clipboard permission.

Does an AI keyboard require an internet connection?

Every online AI correction is two steps: send the text, get the result back. So speed depends on your connection, how much text you sent, and how fast the AI service responds. The keyboard itself still works offline. The AI actions just won't.

Where does an AI keyboard work?

Anywhere iOS supports third-party keyboards, in principle. Messages, WhatsApp, Mail, Gmail, Notes, Safari, Slack, Telegram, most social apps. But the actual availability comes down to Apple's rules and each app's own choices, not the keyboard.

AI keyboard versus Apple's keyboard

Apple's keyboard is built for everyday typing: autocorrect, predictions, deep system integration. An AI keyboard does something else entirely — grammar fixes, rewriting, translation, tone shifts. They're not competing, they're complementary. Apple's keyboard covers the locked-down fields; Checker covers the AI writing work.

• Apple Keyboard focuses on typing and system integration
• Checker focuses on AI correction, rewriting, translation, and tone adjustment
• Apple's keyboard handles secure fields
• Both keyboards can remain enabled simultaneously

Technical limitations

Same rules as any iOS keyboard extension apply here: no auto-selecting text, no bypassing app restrictions, no reading an entire document. Online AI actions need Full Access plus a connection. That's also why some actions rely on Read from Input, Copied Text, or manual insertion, instead of just rewriting everything on the spot.

Frequently asked questions