Grammar Fix
Private AI grammar keyboard
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
GrammarFix helps you correct grammar, rewrite, translate and draft wherever you type. Choose on-device Apple Intelligence or optional Cloud AI powered by GPT.
Tap to fix grammar and spelling in Messages, Mail, Notes and other apps that support custom keyboards. Rewrite in styles such as Professional, Friendly, Concise, Polite, Confident and Funny, or use presets for X, Instagram and Threads.
REFINE YOUR WRITING
Preview a rewrite, then give another instruction before applying it. Cloud AI can suggest editing directions based on the draft. Apply when you are happy with the result, or cancel and keep your original text. Undo restores the original after a correction or rewrite.
A BETTER KEYBOARD
Type with spelling suggestions and optional auto-correction. Hold Delete to repeat, double-tap Space for a period, double-tap Shift for Caps Lock, or hold Space and drag to move the cursor. Optional haptics add feedback while typing.
MORE WRITING TOOLS
- Translate into 10 languages
- Draft and refine text with AI chat
- Send your draft from the keyboard into chat with Craft
- Create custom rewrite presets
- Save optional background and writing preferences for personalization
YOUR CHOICE OF AI
On-device AI uses Apple Intelligence and processes submitted text locally. It requires iOS 26, a supported iPhone and Apple Intelligence availability.
Cloud AI is optional and off by default. Selecting it sends submitted text, recent chat context and enabled personalization to App City Studios and OpenAI. Cloud editing suggestions also send the current draft. Cloud AI requires internet, is subject to service usage limits, and requires Allow Full Access when used in the keyboard. Ordinary typing does not trigger cloud AI requests. Switch back to on-device AI in Settings at any time. See our privacy policy for processing and retention details.
FREE AND PREMIUM
Grammar fixes and a limited number of daily AI chats are free. Premium unlocks all writing styles, translation, emoji, custom presets, rewrite refinement and chat without the free daily chat limit. Cloud service usage limits still apply. Choose Lifetime, Monthly or Yearly.
Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Manage subscriptions in your Apple Account settings.
Requires iOS 18 or later.
Terms of Use: https://appcitystudios.com/eula
Privacy Policy: https://appcitystudios.com/privacy-policy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Refine a rewrite with your own instructions before applying it.
- Get suggested editing directions when using Cloud AI.
- Choose Cloud AI or on-device AI directly in Try it and Settings.
- Enjoy faster keyboard typing, spelling suggestions, auto-correction and cursor movement by holding Space.
- Preview, apply, cancel and undo rewrites with improved protection against accidental text changes.
The developer, APPCITY Limited Liability Company, 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 Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- APPCITY Limited Liability Company
- Size
- 2.6 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- GrammarFix Premium Yearly $29.99
- GrammarFix Premium Monthly $4.99
- GrammarFix Premium Lifetime $49.99
- Copyright
- © 2026 APPCITY Limited Liability Company