Best Proofreading Apps in 2026: Mobile, Desktop & Browser Tools

We installed 14 proofreading apps across three phones, two tablets, four browsers, and three desktop operating systems. Then we ran the same set of 20 text samples — academic papers, business emails, blog posts, and student essays — through every single one.

Most "best proofreading app" lists rank tools without testing them on the same material. We did the work. Here is which proofreader app actually performs best on each platform and for each use case.

Best web app: ProofreaderPro.ai

Best for: Academic researchers and students who need the best proofreading app for papers, theses, and journal manuscripts.

ProofreaderPro.ai runs entirely in the browser. No installation, no extension, no app store download. Upload a document, select your editing density, review corrections, and export a tracked changes Word file.

What sets it apart: It is the only proofreading application built specifically for academic writing. Three editing depth levels (Light, Medium, Comprehensive), citation format preservation, 50+ language support for ESL researchers, and — the feature no other app matches — tracked changes .docx export. Your advisor opens the file in Word and sees every edit displayed as if a human editor made them.

Strengths: Academic-specific corrections. Tracked changes export. Citation awareness. Three editing depths. Works on any device with a browser. Free tier: 5,000 words/month.

Weaknesses: No browser extension for real-time checking. No mobile keyboard integration. Designed for document-level editing, not sentence-by-sentence checking.

Price: Free tier available. $5 first month, then $10/month.

Best browser extension: Grammarly

Best for: Professionals who write across multiple web platforms — email, Slack, Google Docs, LinkedIn, social media.

Grammarly's Chrome extension is the most polished real-time proofreader app on the market. It activates in virtually every text field you encounter online and provides instant corrections as you type. The suggestions are accurate for general English writing, and the interface is clean and non-intrusive.

Strengths: Works everywhere in the browser. Real-time corrections. Excellent UI. Strong grammar and spelling detection. Tone detection is genuinely useful.

Weaknesses: Limited academic awareness — flagged properly formatted citations as errors in our testing. Pushes text toward conversational tone. No tracked changes export. Premium required for advanced suggestions. English only.

Price: Free basic tier. Premium: $12/month (annual) to $30/month (monthly).

For a deeper comparison of Grammarly and academic-specific tools, see our best proofreading software roundup.

Best mobile keyboard: Grammarly Keyboard

Best for: Anyone who writes frequently on their phone and wants grammar checking in every app — texts, emails, notes, social media.

The Grammarly Keyboard replaces your default keyboard on iOS and Android. It provides real-time proofreading apps for android and iOS directly in the keyboard layer, meaning it works in WhatsApp, Gmail, Notes, and every other app without separate integration.

Strengths: Works in every mobile app. Real-time corrections. Solid autocorrect that is smarter than default keyboards. Available on both iOS and Android. Free tier included.

Weaknesses: Battery drain on older devices. Requires giving a third-party keyboard full access to your typing data. Academic writing on a phone is rare — this is primarily a casual writing tool. Limited to shorter text.

Price: Free with basic features. Premium features require Grammarly subscription.

Best browser extension alternative: LanguageTool

Best for: Multilingual writers who need a free proofreading app that works in languages beyond English.

LanguageTool supports over 30 languages natively, making it the best proofreading application for non-English writing. The browser extension works similarly to Grammarly — real-time corrections in text fields across the web. The open-source core means a strong developer community and frequent updates.

Strengths: 30+ languages. Good free tier. Browser extension and desktop apps. Open-source core. Strong for European languages.

Weaknesses: English corrections are less sophisticated than Grammarly's. Academic awareness is minimal. No tracked changes export. UI is functional but less polished.

Price: Free tier. Premium: $6.99/month (annual).

Best desktop app: Hemingway Editor

Best for: Writers who want to improve readability and sentence clarity in long-form documents.

Hemingway Editor takes a different approach. Instead of correcting grammar, it highlights readability issues — long sentences, passive voice, adverb overuse, complex phrases. It assigns a readability grade level and helps you write clearer, tighter prose.

Strengths: Unique readability analysis. Highlights structural issues that grammar checkers miss. Desktop app works offline. One-time purchase option. Clean, focused interface.

Weaknesses: Does not catch grammar or spelling errors (it is not a proofreader in the traditional sense). No academic-specific features. No tracked changes. No citation awareness. Limited to readability improvement.

Price: $19.99 one-time purchase for desktop.

Best mobile app for academic writing: ProWritingAid

Best for: Long-form writers who want detailed writing analytics on mobile.

ProWritingAid offers both iOS and Android apps that proofread your text while providing style analytics — sentence length variation, overused words, pacing analysis, and readability scores. The mobile app is more fully featured than most competitors' mobile offerings.

Strengths: Detailed writing analytics. Mobile and desktop apps. Good Scrivener integration. Lifetime purchase option. 20+ writing reports.

Weaknesses: Interface is complex for simple proofreading. Academic features are limited. Mobile app can be slow with long documents. No tracked changes export.

Price: $10/month (annual). Lifetime: $399.

Best free proofreading app options

If budget is your primary constraint, here are the strongest free options:

LanguageTool (free tier): 20,000 characters per check. Supports 30+ languages. Browser extension included. Best free proofreading app for multilingual writers.

Grammarly (free tier): Basic grammar and spelling corrections. Browser extension works everywhere. English only. Best free option for general writing.

ProofreaderPro.ai (free tier): 5,000 words/month. Full feature access including tracked changes and all three editing densities. Best free proofreading app for academic writing — no feature restrictions, just a word limit.

Microsoft Word: Built-in spell check and grammar check. Already included if you have Office. Catches obvious errors but misses style and clarity issues.

How to choose the right proofreading app

The best proofreader app depends on what you write and where you write it:

Most researchers and students will get the best results from a two-tool setup: ProofreaderPro.ai for document-level academic proofreading with tracked changes, and Grammarly's free browser extension for real-time corrections in email and web forms.

For a focused comparison of the top AI-powered tools, see our best AI proofreading tools roundup.

Frequently asked questions

What is the best free proofreading app for students?

ProofreaderPro.ai's free tier (5,000 words/month) is the strongest option for academic work because it includes tracked changes and all editing depths without feature restrictions. For general writing and email, Grammarly's free tier covers basic grammar and spelling. Both together cost nothing and cover most student needs.

Are there good proofreading apps for android?

Grammarly Keyboard is the best proofreading app for Android for everyday mobile writing. It works across all apps as a keyboard replacement. For academic proofreading on Android, use ProofreaderPro.ai through your mobile browser — the web interface is fully responsive.

Can a proofreading app replace a human editor?

For grammar, spelling, punctuation, and style consistency — yes, the best apps that proofread now match human editors on accuracy and exceed them on speed and cost. Where human editors still add value is in developmental editing (argument structure, logical flow) and discipline-specific judgment. For most routine document proofreading, an AI proofreading application is sufficient.

Do proofreading apps work offline?

Hemingway Editor (desktop version) and ProWritingAid (desktop version) work offline. Browser extensions and web apps — including Grammarly, LanguageTool, and ProofreaderPro.ai — require an internet connection. If you need offline proofreading, a desktop app is your only option.

Best Proofreading App for Academic Writing

Upload your paper. Pick your editing depth. Export tracked changes to Word. Purpose-built for researchers, theses, and journal submissions.