Does Grammarly have AI on iPhone?

Grammarly's iPhone keyboard handles grammar and spelling, but the AI rewriting tools — tone change, paraphrasing, generative AI — only run in Grammarly's desktop app and browser extension. On iPhone, the keyboard doesn't do AI rewriting. To get Grammarly-style AI inside the iPhone keyboard, you need a different keyboard app (the category that emerged in 2025-26 — 'AI keyboards' — fills this specific gap).

What is the difference between Grammarly Keyboard and AI keyboards like KeyAI?

Grammarly Keyboard fixes spelling and grammar — it does NOT rewrite tone, translate between languages, paraphrase, or run ChatGPT-style prompts inside the keyboard. AI keyboards (KeyAI, CleverType, TypeAI, Keybot) layer Grammarly-style grammar checking AND a full AI writing toolkit — tone change, translate, paraphrase, ask AI, generate replies — into the keyboard itself. If you only want grammar corrections, Grammarly's free tier is fine. If you want the AI features Grammarly has on desktop, you need an AI keyboard on iPhone.

Is Grammarly's AI on iPhone free?

Grammarly Keyboard's basic grammar checking is free on iPhone. Grammarly Premium ($12-30/mo depending on plan) adds AI features on desktop and web — but those features still do not appear inside the iPhone keyboard, only inside the Grammarly app itself. For Grammarly-style AI directly inside your iPhone keyboard (working in any app), the AI-keyboard apps offer 3-day free trials without a credit card, typically $30-60/year after.

Can I use Grammarly's AI in WhatsApp / Messages / Mail on iPhone?

No — Grammarly's AI writing features only work inside the Grammarly iOS app itself, not in WhatsApp / Messages / Mail / any third-party app. Their Keyboard appears in other apps but only handles spelling and grammar. If you want AI rewriting (tone change, translation, paraphrasing) directly inside WhatsApp or Mail, an AI keyboard is currently the only option on iPhone.

What does an AI keyboard do that Grammarly's keyboard doesn't?

On iPhone, an AI keyboard typically adds: (1) Tone change — make a message warmer, more formal, or shorter, (2) Translation — write in one language, tap translate, message becomes the other language, in place, (3) Paraphrase — rewrite a sentence in a different style, (4) Ask AI — ChatGPT-style questions answered inside the keyboard without leaving the app, (5) Generate replies — AI drafts a contextual reply for you, (6) Humanize — rewrite AI text to sound more human. Grammarly Keyboard does grammar only.

Is it safe to install a third-party keyboard on iPhone?

Yes, when you pick a reputable one. iOS automatically disables any third-party keyboard in password fields, credit-card fields, and other secure inputs — regardless of which keyboard you install. The system keyboard reappears for those fields. A well-designed AI keyboard only sends text to its AI provider when you actively tap a feature, never in the background. Check the privacy policy of any keyboard (and look for an explicit no-keystroke-logging statement) before granting Full Access.

Which AI keyboard works most like Grammarly?

KeyAI has the closest feature overlap with Grammarly Premium — grammar + tone change + paraphrasing + AI rewriting + 55+ language translation. CleverType is the second-closest and is cheaper. TypeAI is the cheapest annual plan but has fewer languages. Keybot is similar to KeyAI on grammar but has fewer AI tools beyond that. All four have free trials without entering a card.

Does Apple Intelligence cover what Grammarly's AI does?

Partly. Apple Intelligence Writing Tools (iPhone 15 Pro+) include Rewrite, Proofread, Summarize, and tone shift — these overlap with about 60% of what Grammarly Premium does on desktop. But Apple Intelligence is English-only at launch (more languages rolling out in 2026), doesn't translate between languages, and doesn't expose a ChatGPT-style ask-AI flow. If you're on a non-Pro iPhone or write in non-English, Apple Intelligence won't cover the gap.

Will my typing data be sent anywhere if I install an AI keyboard?

Only when you actively tap an AI button. Text never leaves the keyboard otherwise — reputable AI keyboards do not log keystrokes or run background analysis. When you tap (e.g.) Humanize, the selected text is sent to the keyboard's AI provider, the rewritten version is returned, and the text is replaced in the field. iOS additionally blocks the keyboard from password and credit-card fields automatically, so those never get sent. Reputable keyboards publish a privacy policy with these guarantees in writing.

How do I cancel an AI keyboard subscription?

Settings → tap your Apple ID at the top → Subscriptions → tap the keyboard's subscription → Cancel Subscription. Takes 5 seconds. If you cancel before the 3-day free trial ends, you won't be charged. Subscriptions are billed by Apple, not the keyboard developer, which means cancellation is one tap and there's no email-to-cancel runaround.

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Grammarly AI on iPhone — the keyboard alternative most people miss in 2026

June 10, 2026

If you’ve searched “Grammarly AI” lately and tried to use it on your iPhone, you’ve probably noticed something annoying: Grammarly’s actual AI features — the tone change, the AI rewriting, the paraphrasing, the writing assistant — don’t show up inside the iPhone keyboard at all.

Grammarly’s iPhone keyboard does grammar. That’s it. The AI Writing tools that make Grammarly Premium worth paying for live in their desktop app and browser extension. On iPhone, you get spell-check and a basic grammar pass. If you wanted AI rewriting inside Messages, WhatsApp, Mail, or Notes — you can’t. Not with Grammarly.

This is the gap an entire new category of iPhone apps filled in 2025–26: AI keyboards. They put Grammarly-style AI directly inside the keyboard, so the AI features show up in every app you type in.

If you came here looking for “Grammarly AI on iPhone,” this is what you’re actually looking for.

What Grammarly’s AI actually is — and where it lives

Grammarly’s AI features (rebranded as “Grammarly AI” in 2024) include:

Generative AI — generate, brainstorm, or rewrite text from a prompt
Tone adjustments — make text more formal, friendlier, more confident
Voice rewrites — match a tone you’ve defined (your “voice”)
Paraphrasing — restate the same idea in different words
Idea generation — brainstorm content angles for emails, posts, etc.

These all run on Grammarly’s servers using their own language models. They’re available in:

✅ Grammarly’s desktop app (Mac / Windows)
✅ Grammarly’s Chrome / Safari / Edge browser extension
✅ Grammarly’s iOS app — but only inside Grammarly’s own editor, not in other apps

They are not available in:

❌ Grammarly Keyboard on iPhone (it only does grammar)
❌ Any other iPhone app via Grammarly

This last point catches almost everyone off guard. Most people install Grammarly Keyboard expecting the AI rewriting they’ve seen on desktop, switch to it in iMessage, and find… nothing AI. Just grammar squiggles.

The “AI keyboard” category — what changed in 2025–26

Starting in late 2024 and accelerating through 2025, a handful of indie iOS developers shipped keyboards that did what Grammarly’s keyboard didn’t: they put the full AI writing toolkit inside the keyboard itself.

The leaders in this category as of 2026 are KeyAI, CleverType, TypeAI, and Keybot. We’ve covered all four in our 10 best AI keyboards for iPhone in 2026 ranking — you can see the side-by-side comparison there. The short version:

What you can do	Grammarly Keyboard	AI keyboards (KeyAI etc.)
Fix grammar	✓	✓
Change tone (formal / casual / friendly)	✗	✓
Translate text across 50+ languages	✗	✓
Paraphrase / rewrite	✗	✓
Ask AI a question in-app	✗	✓
Generate an AI reply	✗	✓
Humanize ChatGPT output	✗	✓
Works in WhatsApp / Messages / every app	✓ (grammar only)	✓ (full AI)

The AI keyboards all work the same way: install from App Store, enable in Settings → Keyboards, grant Full Access, switch via globe icon. Total setup: under 90 seconds.

How to install an AI keyboard on iPhone

The whole flow:

Download from the App Store. Search “AI keyboard” or pick by name (KeyAI, CleverType, TypeAI, Keybot).
Settings → General → Keyboard → Keyboards → Add New Keyboard. Tap the AI keyboard you installed.
Tap its name in the active list → toggle “Allow Full Access” on. Full Access lets the keyboard reach the internet, which is required for AI features to run.
In any app, long-press the globe icon (next to the spacebar) and pick the AI keyboard. It’s now available everywhere.
Select text, tap an AI button. The rewritten text replaces the selected text in place.

That’s it. The keyboard works exactly like Grammarly Keyboard does — except the AI tools work inside Messages, WhatsApp, Mail, Slack, and every other app, not just inside Grammarly’s editor.

Privacy — what about “Allow Full Access”?

Apple shows a scary warning when you toggle Full Access. The warning is generic and is shown for every third-party keyboard, not just AI ones. Here’s what’s actually true:

iOS automatically disables any third-party keyboard in password fields, credit-card fields, and Apple Pay flows. This is enforced by the OS, not the keyboard. So whatever keyboard you have installed, it cannot see your passwords or card numbers.
Reputable AI keyboards only send text to their AI provider when you actively tap an AI button. They do not stream your keystrokes to a server in the background.
Cancellation is one tap via Apple Subscriptions. Apple, not the keyboard developer, manages billing. There’s no email-to-cancel runaround.

We’ve gone deeper on the iOS keyboard privacy model in AI keyboard privacy: what “Full Access” really means in 2026. Worth a read before granting Full Access to any keyboard.

Pricing — Grammarly Premium vs AI keyboards

	Grammarly Premium	Typical AI keyboard
Monthly	$12-30 (varies by plan)	$4-7
Yearly	$144-300	$30-60
Free trial	7 days (card required)	3 days (no card)
Cancellation	Email + website	One tap in Apple Subscriptions
Works in WhatsApp etc	✗	✓

For pure grammar checking on iPhone, Grammarly’s free tier is fine. If you also want Grammarly’s AI rewriting (tone, paraphrase, translate) actually working inside your iPhone keyboard — which is what most people searching “Grammarly AI iPhone” actually want — an AI keyboard at $30-60/year is roughly half the cost of Grammarly Premium and gives you all the AI features inside every app.

What about Apple Intelligence?

If you have an iPhone 15 Pro or newer running iOS 18+, Apple Intelligence Writing Tools cover about 60% of what Grammarly Premium does — Rewrite, Proofread, Summarize, tone shift. It’s free, runs on-device for many tasks, and is genuinely good.

What Apple Intelligence does not do:

Translate text in place across 50+ languages
Generate AI replies tailored to a conversation
Work on iPhone 14 or earlier (or non-Pro iPhone 15 models for many tasks)
Cover non-English languages at full functionality (rolling out through 2026)
Provide an ask-AI chat-style flow

For an iPhone 15 Pro+ user in English who only wants rewriting and proofreading: Apple Intelligence is enough. For everyone else: an AI keyboard is the gap-filler.

We compare them side by side in AI keyboard vs Apple Intelligence.

Verdict — what to do if you searched “Grammarly AI iPhone”

If you want only grammar fixes on iPhone: stick with Grammarly Keyboard’s free tier. It does that one job well.
If you want Grammarly’s AI features (tone, paraphrase, AI rewriting) actually working inside your iPhone keyboard: install an AI keyboard. Start with the 3-day free trial of any of the four mainstream ones — KeyAI is our flagship pick (we compare every option here).
If you have iPhone 15 Pro+ and write only in English: try Apple Intelligence first. It’s free, on-device, and might be enough.
If you write in multiple languages: an AI keyboard is currently the only option on iPhone with translation built in.

The summary: Grammarly does AI well on desktop. Their iPhone keyboard doesn’t include it. The fix is a different keyboard — installed once, works everywhere on iPhone after.