Grammar Fix
Private AI grammar keyboard
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Fix grammar, rewrite in any style, translate, and chat - all on-device with Apple Intelligence. What you type never leaves your iPhone. Fixing grammar is free, forever.
GrammarFix is the on-device AI keyboard that fixes your grammar, sharpens your writing, and keeps every word private.
Tap once to correct grammar and spelling anywhere you type - Messages, Mail, Notes, social apps, any text field. Need a different tone? Rewrite the same text as Professional, Friendly, Concise, Polite, Confident, or Funny. Translate as you type into 10 languages. Or open the built-in AI chat to draft and refine anything.
Everything runs on your iPhone using Apple Intelligence. No servers. No network. No tracking. Your words never leave your device - so you get powerful AI writing help without handing your text to anyone.
WHAT YOU CAN DO
• Fix grammar and spelling instantly, right from the keyboard
• Rewrite in any style: Professional, Friendly, Concise, Polite, Confident, Funny
• Add fitting emoji to your message with one tap
• Translate your text into 10 languages, on-device
• Chat with an on-device AI to write emails, notes, replies, and more
• Craft: send what you've typed straight into chat to refine it
• Save your own custom rewrite styles
PRIVATE BY DESIGN
GrammarFix processes everything locally with Apple's on-device models. Nothing you type is sent to a server or shared with anyone, ever.
FREE AND PREMIUM
Fixing grammar is free, forever — plus a few AI chats every day. Upgrade to Premium for every writing style, translation, emoji, custom presets, and unlimited AI chat. Choose a one-time Lifetime unlock or a monthly or yearly subscription (the yearly plan includes a free trial).
REQUIREMENTS
The on-device AI features need an iPhone with Apple Intelligence (iOS 26). On other devices, GrammarFix uses a lighter built-in spelling fix.
Subscriptions auto-renew unless canceled at least 24 hours before the end of the period; manage or cancel anytime in your Apple Account settings. Terms of Use: https://appcitystudios.com/eula - Privacy Policy: https://appcitystudios.com/privacy-policy
Write with confidence - privately. Download GrammarFix today.
Terms of Use (EULA): 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.
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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- APPCITY Limited Liability Company
- Size
- 2.3 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