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Best Sentence Checking Apps

249+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated September 2026

Grammar is the household name in sentence checking, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Sentence Checking Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Grammar: Sentence DiagrammerGrammar: Sentence DiagrammerFree4.4★ (1K)YesYesSep 2026
2Grammar Check: Spell CorrectorGrammar Check: Spell CorrectorFree4.8★ (410)YesYesSep 2026
3Rewrite: Sentence CorrectorRewrite: Sentence CorrectorFree4.8★ (371)YesYesSep 2026
4Sentence CorrectorSentence CorrectorFree4.8★ (32)NoYesJul 2026
5AI Grammar Check: CorrectorAI Grammar Check: CorrectorFree—NoYesAug 2026
6Grammar Check Corrector AIGrammar Check Corrector AIFree4.8★ (224)NoYesSep 2026
7AI Grammar Check & Spell CheckAI Grammar Check & Spell CheckFree3.4★ (120)NoYesSep 2026
8Proofreader: Grammar CheckProofreader: Grammar CheckFree4.3★ (19)YesYesSep 2026

Top Picks for Sentence Checking

Grammar: Sentence Diagrammer#1

Grammar: Sentence Diagrammer by Cookie in the fridge LLC

Spelling Check & Corrector
Editor's Choice
📊 Productivity
4.4😊(1K ratings)
FreeAdsIn-App Purchases
Grammar: Sentence Diagrammer screenshot 1
Grammar: Sentence Diagrammer screenshot 2
Grammar: Sentence Diagrammer screenshot 3
Grammar: Sentence Diagrammer screenshot 4
Grammar: Sentence Diagrammer screenshot 5
Grammar: Sentence Diagrammer screenshot 6

Improve your writing with this app that offers grammar and spelling checks, synonym suggestions, and word definitions. Enhance your text style and vocabulary for professional and personal communication.

What We Love

  • 👍 Easy to use
  • 🚀 Helpful for writing and grammar
  • 💡 Provides useful suggestions
  • 🚀 Accurate grammar and spelling corrections
  • 👍 Intuitive app interface

Room to Improve

  • 🐛 Occasional glitches and bugs
  • 🤔 Limited functionality compared to expectations
  • 💬 Annoying pop-ups asking for reviews
  • 🤔 Inconsistent performance in detecting errors
Grammar Check: Spell Corrector#2

Grammar Check: Spell Corrector by talha rehman

Fix Grammar & Sentence Checker
Strong Contender
📊 Productivity
4.8😊(410 ratings)
FreeAdsIn-App Purchases
Grammar Check: Spell Corrector screenshot 1
Grammar Check: Spell Corrector screenshot 2
Grammar Check: Spell Corrector screenshot 3
Grammar Check: Spell Corrector screenshot 4
Grammar Check: Spell Corrector screenshot 5
Grammar Check: Spell Corrector screenshot 6

This AI-powered tool goes beyond basic spelling and punctuation to correct grammar, enhance clarity, and improve sentence structure. It supports file uploads for large documents and offers unlimited checks with a history tracking feature for easy review.

What We Love

  • 👍 Great tool for grammar checking
  • 🚀 Quick and efficient
  • 👍 Useful for writing career
  • 👍 Helpful for learning disabilities
  • 👍 Works well
  • 👍 Convenient and useful
  • 👍 Awesome app
  • 👍 Helped get an A
  • 👍 Straight to the point
  • 👍 No plan to buy needed
  • 👍 Very good app
  • 👍 Easy to use
  • 👍 Top grade
  • 👍 Best platform
  • 👍 Best thing since Microsoft Word
  • 👍 Works great
  • 👍 Good app overall
  • 👍 Brilliant app
  • 👍 Love it

Room to Improve

  • 🐛 Tutorials not in chosen language
  • 🐛 Korean language support removed
  • 🐛 Translation glitches
  • 🐛 Unlimited word count misleading
  • 🐛 Ads appear frequently even after subscription
  • 🐛 Too many ads
  • 🐛 Irritating and frustrating ads
  • 🐛 Notification message not localized
  • 🐛 Annoying notification screen
  • 🐛 Apostrophes replaced with â
Rewrite: Sentence Corrector#3

Rewrite: Sentence Corrector by Evgeniy Mikholap

Supercharge Your Writing
Worth Considering
📊 Productivity
4.8😊(371 ratings)
FreeAdsIn-App Purchases
Rewrite: Sentence Corrector screenshot 1
Rewrite: Sentence Corrector screenshot 2
Rewrite: Sentence Corrector screenshot 3
Rewrite: Sentence Corrector screenshot 4
Rewrite: Sentence Corrector screenshot 5
Rewrite: Sentence Corrector screenshot 6

Improve your writing with this AI-powered tool that corrects grammar, spelling, and suggests synonyms. It offers contextual checks and explanations to help you write like a native speaker and enhance your English skills.

What We Love

  • 👍 Excellent for grammar improvement
  • 🚀 Fast and effective
  • 👍 Improves writing skills tremendously
  • 👍 Perfect for college
  • 👍 Helps fix grammar and makes writing sound better
  • 👍 Simple and accurate
  • 👍 Easy to use
  • 👍 Helpful for proofreading and editing
  • 👍 Great for writing a book
  • 👍 Useful for LinkedIn posts and chatting
  • 👍 Good for checking tweet grammar

Room to Improve

  • 😞 Disappointed with customer service
  • 😞 Charged for unused app
  • 🤔 Wish pricing was better
  • 🤔 Desire for monthly/yearly subscription at lower rate

More Sentence Checking apps to explore

FAQ about Sentence Checking

What are the best sentence checking apps for iPhone?
Grammar: Sentence Diagrammer tops our sentence checking apps ranking as of September 2026, with a 4.4-star average from 1K App Store ratings, and it's free to download.
Yes — 20 of the top sentence checking apps we rank are free to download, including Grammar: Sentence Diagrammer and Grammar Check: Spell Corrector.
Grammar: Sentence Diagrammer shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ sentence checking apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app helps you improve your writing by checking for grammar mistakes and typos. It also enhances your text style, suggests synonyms, and provides word definitions to enrich your vocabulary.
Key features include automatic grammar correction, spelling checks, synonym suggestions, word definitions, and tools to improve text style. It aims to make your written messages professional and error-free.