GrammarKey: AI Grammar Fixer

Fix & rewrite English, any app

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Write flawless English on any iPhone — no matter the model. GrammarKey is the AI keyboard that fixes your grammar and rewrites your text right where you type: WhatsApp, Gmail, LinkedIn, iMessage, any app. No copy-paste, no app switching. Type, tap once, and sound natural and professional instantly. WORKS ON EVERY IPHONE Apple's built-in Writing Tools only runs on the newest iPhone 15 Pro and later. GrammarKey brings one-tap AI grammar and rewriting to iPhone 11, 12, 13, 14, SE and beyond. If your phone can't get Apple Intelligence, GrammarKey is how you get AI writing help. HOW IT WORKS Switch to GrammarKey in any app. Type your message. Tap Fix, Rewrite, or 文→En. The AI corrects your text instantly — in iMessage, WhatsApp, Gmail, Slack, LinkedIn, or anywhere else. WHAT IT DOES - Fix: corrects grammar, spelling and punctuation — in your own language - Rewrite: makes your text sound natural; long-press to pick a tone (Professional, Friendly, or Confident) - 文→En: write in your language and get polished, correct English - Move the cursor by holding the space bar, like the system keyboard - Clean design that looks like the native iOS keyboard - Your text is never stored — processed in real time and gone WHO IT'S FOR Non-native English speakers who write professionally. People tired of copy-pasting to Grammarly or switching to ChatGPT. Anyone who wants to sound polished without breaking their flow. WHY GRAMMARKEY - No copy-paste. No app switching. It's your keyboard. - Works on iPhones Apple Intelligence leaves out. - Same AI as ChatGPT (GPT-4o mini) - Privacy-first: your text is never stored FREE & PRO Fix grammar on short messages free and unlimited — no subscription, no sign-up. Longer text (emails, essays, reports) is free 3 times a day, and so are Rewrite and 文→En. GrammarKey Pro removes every limit: unlimited long text, unlimited Rewrite and unlimited 文→En translation. $3.59/month or $17.99/year. Cancel anytime. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://grammarkey-proxy.wxqhwbwgdh.workers.dev/privacy

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

• Long text is fixed reliably again: corrections are never cut off part-way, and your original text is never overwritten by a partial result. • Faster, more responsive typing — especially when you type quickly or use accented letters. • Selecting a line no longer joins it to the next one. • Prices and free-trial details now display correctly in every country.

Version 2.1

The developer, Dmitrii Kolesnikov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Dmitrii Kolesnikov
    Size
    • 2.1 MB
    Category
    • Productivity
    Compatibility
    Requires iOS 26.2 or later.
    • iPhone
      Requires iOS 26.2 or later.
    • iPad
      Requires iPadOS 26.2 or later.
    • Mac
      Requires macOS 26.2 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.2 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    • GrammarKey Annual $17.99
    • GrammarKey Monthly $3.59
    • Learn More
    Copyright
    • © 2026 Dmitrii Kolesnikov
  • Privacy Policy

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