AI keyboard for iPhone
AI Keyboard for iPhone | Learn How It Works | Checker
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An AI keyboard sounds more dramatic than it is. It is a regular iPhone keyboard with a few writing tools attached. You type or paste something, choose an action, and get a corrected, rewritten, or translated version back. The useful part is simple: you can improve a message without leaving the app where you wrote it.
What an AI keyboard actually does
A normal keyboard helps you enter text. An AI keyboard can also work on the text itself. Checker can fix grammar and spelling, make a message shorter, change its tone, paraphrase it, turn it into a list, or translate it. These actions are not supposed to run invisibly. You choose the text and decide what should happen to it.
- Fix a sentence without opening another app
- Rewrite a message as friendly, formal, casual, polite, or flirty
- Translate text from the keyboard
- Shorten or restructure text you have already written
How it works on iPhone
Apple treats every third party keyboard as an extension. Its custom keyboard documentation explains how keyboards are enabled, switched, and used wherever iOS supports them. After installing Checker, you enable it in Settings and switch to it with the globe button. Checker can read the available input or use text you copied, but you still start every check yourself.
- Install Checker from the App Store
- Enable the keyboard in iPhone Settings
- Turn on Allow Full Access for online AI actions
- Open a text field and switch keyboards with the globe button
- Choose the text and the action you want
Why Full Access is required
A custom keyboard starts without network access. That is a sensible default, but an online AI model cannot return a correction without a network request. Apple documents that Allow Full Access enables network access and shared-container capabilities. The permission deserves attention. The important question is not whether an online AI keyboard asks for it. The important question is what the developer sends and when.
What Checker sends
Checker sends text for processing only after you choose an action such as Standard Check, Friendly, Shorter, or Translate. Simply typing with the keyboard is not the trigger. The Checker Privacy Policy states that personal text is not stored on its servers. Even with that design, it is good practice to keep passwords, payment details, recovery codes, and other secrets out of any online writing tool.
Where an AI keyboard may disappear
Third party keyboards do not control every text field on iPhone. According to Apple's interface documentation, iOS shows the system keyboard in secure text fields and phone pad fields, and an app can block custom keyboards completely. If Checker is available in Messages but missing from a banking app or a sign in screen, that is usually an iOS or app restriction, not a failed installation.
The limitation people notice first
A keyboard extension does not receive the entire page on your screen. It gets limited access to the active text field, and the amount of surrounding text can vary by app. For a short message, Read from Input is often enough. For a longer passage, copying the exact text you want to edit is more predictable. This small bit of friction is a consequence of the iOS extension model, not something an AI keyboard can bypass.
Who an AI keyboard is for
An AI keyboard is most useful when the same problem happens several times a day: you write a message, doubt the grammar or tone, open another app, paste the text, edit it, and return. If you only proofread a long document once a month, a full editor is probably better. If you regularly fix short messages across Mail, Messages, WhatsApp, Slack, or social apps, keeping the tool in the keyboard saves real time.
AI keyboard limits at a glance
| Question | Answer |
|---|---|
| Does it replace Apple's keyboard? | No. Both keyboards can stay enabled. |
| Do online AI actions need internet? | Yes. |
| Do they need Full Access? | Yes, when the keyboard sends text to an online service. |
| Does it work in every field? | No. iOS and individual apps can block third party keyboards. |
| Does Checker act while you type? | No. Processing starts when you choose an action. |
Frequently asked questions
Why does Checker need Full Access?
Checker needs network access to send the text you submit for AI processing and return the result.
Can I keep Apple's keyboard enabled?
Yes. Use the globe button to switch between Apple's keyboard and Checker.
Why is Checker missing in some apps?
Secure fields and phone pad fields use the system keyboard. Apps can also disable third party keyboards.
Does Checker work offline?
The keyboard can open, but checking and translation need an internet connection.