The English Writing Assistant
That Teaches You As You Write
NotchTutor corrects your grammar, explains every fix in plain English, and tracks the mistakes you repeat — so your writing actually improves, not just your current draft.
Download Free for MacWhy most writing tools don't actually help you improve
Grammar checkers have one job: fix your text. They do it silently, with no explanation, and you accept the suggestion without understanding the rule. Next week you make the exact same mistake.
The typical experience
You write something wrong, the tool highlights it red, you click "Fix." The correction disappears. You learned nothing.
The pattern you can't see
You've made the same mistake 40 times this month. Your tool fixed it 40 times. Nobody told you.
The cost over time
Months of daily writing, zero improvement. You still rely on autocorrect for the same handful of errors.
How NotchTutor makes you a better writer
Four things that set apart a real English writing assistant from a spell-checker with ambitions.
Explains the why, not just the what
Every correction comes with a plain-English explanation. You learn the rule — not just the fix — so the same mistake does not trip you up twice.
Tracks your recurring mistake patterns
NotchTutor spots which errors you make again and again and surfaces them clearly. Your own writing history becomes your most effective study guide.
Native macOS — no extensions required
One lightweight app works everywhere on your Mac: email, documents, Slack, Notion, browsers. No copy-pasting, no tab-switching.
Zero data collection
Your words stay on your Mac. NotchTutor never stores, transmits, or analyses your writing in the cloud. True privacy, by design.
Correction + explanation, every time
This is what separates an English tutor from a grammar bot. NotchTutor shows you both the fix and the reason — in plain language, not linguistic jargon.
Before
"Please revert back to me about this."
After
"Please get back to me about this."
Why this matters
"Revert back" is redundant — "revert" already means to go back. In business English, "get back to me" is the natural phrase for requesting a response.
Before
"I am agree with the proposal."
After
"I agree with the proposal."
Why this matters
"Am agree" confuses an adjective phrase with a verb. "Agree" is a verb here — it stands alone without "am." A classic ESL pattern that NotchTutor flags every time.
Before
"Let's discuss about the timeline tomorrow."
After
"Let's discuss the timeline tomorrow."
Why this matters
"Discuss" is transitive — it takes a direct object without needing "about." Adding "about" is a common non-native speaker pattern. Remove it for cleaner professional English.
Want to understand the patterns behind these mistakes? Read our guide on why you keep repeating the same grammar mistakes and how to break the cycle.
Built for the writers who need it most
Whether English is your first language or your third, professional writing carries real stakes. NotchTutor helps you meet them.
Busy professionals
Client emails, quarterly reports, Slack messages, LinkedIn posts — every channel where unclear writing costs you credibility. NotchTutor keeps your writing sharp without slowing you down.
Non-native English speakers
You know your subject. You know your audience. But a handful of recurring grammar patterns make you sound less confident than you are. NotchTutor identifies and explains them — so they stop coming back.
Remote teams
When most communication is text, every message matters. NotchTutor helps distributed teams write with clarity and cultural fluency, without a proofreader on call.
Lifelong learners
You've used grammar tools before. They fixed your sentences but never taught you the rules. NotchTutor changes that — turning every correction into a lesson that sticks.
Also read: How to sound more natural in English writing and our pillar guide on English for non-native professionals .
Frequently asked questions
What is an English writing assistant?
An English writing assistant is software that reviews your writing in real time, catches grammar and style errors, and suggests improvements. NotchTutor goes further by explaining the reasoning behind each fix and tracking the mistakes you repeat — so you actually get better over time, not just temporarily corrected.
How is NotchTutor different from other English writing assistants?
Most assistants fix your text and move on. NotchTutor explains why each correction matters and monitors which mistakes you make repeatedly. That combination turns every writing session into a micro-lesson, so your English improves continuously rather than staying dependent on a tool.
Is NotchTutor really free?
Yes. NotchTutor is free to download and use on macOS. There are no paywalls blocking the core grammar correction and explanation features.
Does NotchTutor work with my existing Mac apps?
Yes. NotchTutor is a native macOS app that works system-wide — Mail, Pages, Notion, Slack, and any text field on your Mac. You don't need a browser extension.
Is my writing data private with NotchTutor?
Completely. NotchTutor processes text locally and does not collect, store, or share your writing. Your data never leaves your Mac.
Can NotchTutor help non-native English speakers?
Absolutely. NotchTutor is designed for both busy professionals and non-native English speakers. The explanations are clear, jargon-free, and focused on building lasting understanding rather than just patching errors.
Start writing better English today
Free, native macOS app. No account required. No data collected. Just better writing — with explanations that make it last.
Download NotchTutor Free