Best Free Grammar App

249+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated November 2026

From beginner-friendly picks to power-user tools, our free grammar app list covers 249+ iPhone apps updated through November 2026. Compare ratings, prices, and screenshots in one place.

Compare top Free Grammar App (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Grammarly: AI Keyboard & VoiceGrammarly: AI Keyboard & VoiceFree4.7★ (228K)NoYesNov 2026
2English Grammar in Use & TestEnglish Grammar in Use & TestFree4.6★ (357)YesNoNov 2026
3CorrectMe Grammar AI KeyboardCorrectMe Grammar AI KeyboardFree4.7★ (13K)YesYesNov 2026
4Better Grammar For AdultsBetter Grammar For AdultsFree5.0★ (1)NoYesOct 2026
5LearnEnglish Grammar (UK ed.)LearnEnglish Grammar (UK ed.)Free4.7★ (40K)YesYesNov 2026
6Grammar: Sentence DiagrammerGrammar: Sentence DiagrammerFree4.4★ (1.1K)YesYesNov 2026
7Grammar Check゜Grammar Check゜Free4.7★ (356)NoYesOct 2026
8Grammar FixGrammar FixFree4.8★ (1.8K)NoNoNov 2026

Top Picks for Free Grammar App

Grammarly: AI Keyboard & Voice#1

Grammarly: AI Keyboard & Voice by Superhuman Platform Inc

Write, dictate, edit, improve
Editor's Choice
📊 Productivity
4.7😊(228K ratings)
FreeIn-App Purchases
#14in Productivity
Grammarly: AI Keyboard & Voice screenshot 1
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Grammarly: AI Keyboard & Voice screenshot 4
Grammarly: AI Keyboard & Voice screenshot 5
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Enhance your writing across all apps with AI-powered suggestions for grammar, spelling, and clarity. Generate new versions of your text, detect tone, and improve conciseness. Also includes a document editor and Safari extension for comprehensive writing support.

What We Love

  • 🚀 Easy to use
  • 🚀 Extremely useful
  • 👍 Helps improve writing skills
  • 👍 Provides useful suggestions
  • 👍 Beneficial for non-native speakers
  • 👍 Seamless integration across devices

Room to Improve

  • 🐛 Buggy keyboard behavior
  • 🐛 Inconsistent performance across platforms
  • 🔒 Privacy concerns with 'full access' requirement
  • 💰 Expensive premium subscription
  • 🤔 Overzealous correction suggestions
English Grammar in Use & Test#2

English Grammar in Use & Test by Xuan Trung Truong

English Grammar with full test
Strong Contender
📚 Education
4.6😐(357 ratings)
FreeAds
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Improve your English grammar with interactive lessons and tests. This app provides clear explanations for mistakes and helps you identify areas needing more practice. Perfect for intermediate learners to enhance their language skills.

What We Love

  • 👍 Very helpful for learning
  • 👍 Good for practice
  • 👍 Explains topics clearly
  • 👍 Easy to make notes
  • 👍 Detailed topic breakdown
  • 👍 Good for B1+ level
  • 👍 Great for reviewing
  • 👍 Explains mistakes well
  • 👍 Superb overall
  • 👍 Free and great
  • 👍 Very well done
  • 👍 Best thing ever
  • 👍 Very nice app
  • 👍 Humble but best
  • 👍 Great and interesting
  • 👍 Learned grammar faster
  • 👍 Explains grammar rules
  • 👍 Excellent app
  • 👍 Super site for tests
  • 👍 The Best
  • 👍 Quite good
  • 👍 Good review app
  • 👍 Literally INSANE
  • 👍 Great for learners

Room to Improve

  • 🐛 Too many bugs
  • 🐛 Too many adverts
  • 🐛 Ads make it unusable
  • 🐛 Errors and crashes
  • 🐛 App crashes on check
  • 🐛 Test verification not working
  • 🐛 Questions jumbled
  • 🐛 Suggests wrong punctuation
  • 🐛 "All of the above" misplaced
  • 🐛 Ads interrupt often
  • 🐛 No paid version without ads
  • 🐛 Ads cannot be closed
  • 🐛 Frustrating ad experience
  • 🐛 Questions not fully finishing
  • 🐛 Gibberish in questions
  • 🐛 Grammatical errors in questions
  • 🐛 Landscape mode not available
  • 🐛 Test section buggy
  • 🐛 Only first line of sentence shown
  • 🐛 Cannot take a test
  • 🐛 White field instead of answers
  • 🐛 No exercises for theory
  • 🐛 Medium difficulty level
CorrectMe Grammar AI Keyboard#3

CorrectMe Grammar AI Keyboard by Teleprompter LLC

Spelling check and paraphrase
Worth Considering
📊 Productivity
4.7😞(13K ratings)
FreeAdsIn-App Purchases
CorrectMe Grammar AI Keyboard screenshot 1
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Enhance your written communication with intelligent grammar and spelling checks. Improve your English writing skills with contextual error detection, smart recommendations, and explanations of mistakes. Share your polished texts effortlessly.

What We Love

  • 👍 Helpful for school work
  • 🤖 Improves writing skills
  • ✨ Useful for professional writing

Room to Improve

  • 💰 Expensive subscription
  • 🔒 Issues with account/subscription management
  • 🐛 App crashes and freezes
  • 📝 Limited text input length

More Free Grammar App apps to explore

FAQ about Free Grammar App

What is the best free grammar app for iPhone?
Grammarly: AI Keyboard & Voice tops our free grammar app ranking as of November 2026, with a 4.7-star average from 228K App Store ratings, and it's free to download.
Grammarly: AI Keyboard & Voice has no ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 249+ free grammar app on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.