How to Use AI in Slack, Gmail, and Notion on Mac Without Extensions

The App-by-App AI Problem

Every productivity app is racing to add AI features. Notion has Notion AI. Gmail has Gemini. Slack has Slack AI. Each one offers some combination of summarization, drafting, and rewriting — but only inside its own walls.

This means your AI writing experience changes depending on which app you are in. Notion AI understands your workspace but cannot help you in Gmail. Gemini in Gmail can draft an email but cannot fix your grammar in Slack. Slack AI can summarize channels but cannot translate a message for your Spanish-speaking colleague.

And then there are the apps that have no AI at all. Apple Mail, Microsoft Word for Mac, VS Code, Discord, Pages, Notes, WhatsApp Desktop, Telegram, your CRM — these applications offer no built-in AI writing assistance. You are on your own, or you are copying text out to ChatGPT and pasting it back.

The result is a fragmented experience. AI works here, not there. It does this in one app, something different in another, and nothing at all in a third. Your writing quality depends on which window happens to be in front of you.

There is a better approach: a single tool that adds AI writing capabilities to every app on your Mac, with the same features and the same interface everywhere.

Why Built-In AI Falls Short in Each App

Slack AI

Slack AI can summarize channels and threads, search across your workspace, and draft short replies. It is useful for catching up on conversations you missed. But it cannot:

Fix grammar or spelling in your messages before you send them
Translate messages into another language
Rewrite your message for a different tone
Generate a message from a prompt
Dictate a message with voice

Slack AI is a consumption tool — it helps you process what others wrote. It does not help you write better yourself. If you want to fix the grammar in a Slack message, adjust its tone from casual to professional, or translate it before sending, Slack AI has no mechanism for any of that.

Gmail (with Gemini)

Gemini in Gmail can draft email replies, help you compose new emails, and suggest refinements. It is the most capable built-in AI of the three, but it has limitations:

It only works inside Gmail in Chrome. If you use Apple Mail, Outlook for Mac, or any other email client, Gemini is not available.
It cannot translate emails — you would need to copy text to Google Translate separately.
It does not support voice dictation as part of the writing workflow.
Tone options are limited to a few presets.
It only works for email. The moment you switch to Slack or Notion, Gemini's assistance disappears.

For Gmail power users who live in Chrome, Gemini is a useful addition. For anyone who uses multiple email clients or writes across multiple apps, it solves only a slice of the problem.

Notion AI

Notion AI is deeply integrated into the Notion workspace. It can generate text, rewrite content, change tone, summarize pages, extract action items, and translate within Notion. For Notion power users, it is the most full-featured built-in AI of the three.

But Notion AI only works in Notion. The moment you switch to Slack to share a summary, to Gmail to email a client, or to Apple Mail to send an internal update, Notion AI is gone. You cannot use it to fix grammar in a Slack message, draft a reply in Apple Mail, or translate a paragraph in VS Code.

Notion AI also requires a Notion Business subscription at $20 per user per month to access AI features with meaningful limits. If you use Notion occasionally but write most of your content elsewhere, paying for a full Business subscription just for AI features is hard to justify.

The Common Thread

Every app's built-in AI is siloed. Each one works well within its own boundaries and offers nothing outside them. If you use three or four apps daily — and most professionals do — you get three or four different AI experiences with three or four different capability sets and three or four different limitations.

The System-Wide Alternative

Instead of relying on each app to build its own AI, there is a different approach: use a native macOS application that operates at the system level, providing AI writing tools in every app through a single keyboard shortcut.

This is how WordWand works. It uses the macOS Accessibility API to read and write text in any application. Select text, press a shortcut, choose an action, and the result replaces your selection — whether you are in Slack, Gmail, Notion, Apple Mail, VS Code, Pages, Notes, or any other Mac app.

The key advantage is consistency. The same grammar correction works in Slack and in Apple Mail. The same translation works in Gmail and in Notion. The same tone adjustment works in Discord and in Microsoft Word. You learn one interface, one shortcut, one workflow — and it works everywhere.

How It Works in Each App

Slack

Fix grammar before sending. Type your Slack message, select the text, press your WordWand shortcut, and choose Fix Grammar. The corrected text replaces the original in the message field. Send with confidence that your message is clean.

Translate for international teams. A colleague messages in English and you need to reply in Portuguese. Type your reply in Portuguese, or write it in English and translate inline to Portuguese before sending. Or select an incoming English message, translate it to your native language to read it, then compose your reply. All without leaving the Slack window.

Adjust tone. You drafted a message that sounds too blunt for the #general channel. Select the text, choose Adjust Tone, pick something warmer. The rewritten version replaces the original. Alternatively, use Ask AI with a custom instruction like "make this more diplomatic" or "add more context so it does not sound dismissive."

Summarize long threads. Select the text of a long Slack thread you have been tagged in, run Summarize, and get the key points without reading every message.

Gmail (in Chrome or Safari)

Grammar and spelling. Select your draft email text, press the WordWand shortcut, fix grammar. This works whether you use Gmail in Chrome, Safari, or Arc — no browser extension needed.

Translate entire emails. Select the body of a received email, translate to your language. Select your reply, translate to the recipient's language. The translation happens inline, replacing the selected text. Over 40 languages are supported.

Draft from scratch. Place your cursor in the reply field, use the AI Writer to generate a first draft from a brief prompt. "Professional reply accepting the meeting invite and suggesting an agenda." The draft appears at your cursor, ready to edit.

Rewrite for tone. Your draft sounds too casual for a client email. Select it, adjust the tone to professional. Or run a custom instruction: "make this more concise — three sentences maximum." For more email-specific workflows, see our post on writing professional emails faster with AI on Mac.

Notion

Fix grammar across pages. Select a section of text in your Notion page, fix grammar inline. This works the same way as it does in Slack or Gmail — one shortcut, same interface.

Translate content for international teams. Select a paragraph and translate it to Spanish, German, Japanese, or any of 40+ other languages. Useful for teams that maintain documentation in multiple languages.

Generate content. Writing a project brief? Use the AI Writer to generate a first draft from bullet points. Writing a retrospective? Describe the key themes and let the AI produce a structured first pass.

Extract action items. Select your meeting notes, run Extract Todos, and get a clean list of action items. This works the same whether your meeting notes are in Notion, Apple Notes, or a Google Doc.

Apple Mail, VS Code, Discord, and Everything Else

This is where a system-wide tool becomes essential. These apps have no built-in AI writing assistance and no browser extension can reach them.

Apple Mail. Fix grammar, translate, adjust tone, generate replies — all the same features that work in Gmail work identically in Apple Mail. No extension, no plugin, no workaround.

VS Code. AI coding assistants handle code, but they do not help you write better commit messages, PR descriptions, README files, or technical documentation. WordWand fills that gap. Select your draft text in a markdown file or a comment field, run grammar correction or ask the AI to simplify for a non-technical audience.

Discord. Fix grammar and spelling in messages before sending. Translate messages for international gaming communities or open-source project channels. Adjust tone when a message sounds harsher than you intended.

Pages, Notes, TextEdit. Every native Mac text editing app works with WordWand. No app is too small or too niche — if it supports text selection, WordWand works in it.

For the full technical explanation of how this system-wide approach works and why browser extensions cannot replicate it, see our post on how to use AI in any Mac app.

What You Get That No Single App Offers

Capability	Slack AI	Gmail Gemini	Notion AI	WordWand
Fix grammar and spelling	❌	⚠️ Basic	✅	✅ Every app
Translate text	❌	❌	✅ Limited	✅ 40+ languages, every app
Adjust tone / rewrite	❌	⚠️ Presets	✅	✅ Custom instructions, every app
Generate text from prompt	❌	✅ Email only	✅ Notion only	✅ Every app
Summarize	✅ Channels	❌	✅ Pages	✅ Any text, every app
Voice dictation	❌	❌	❌	✅ Every app
Text-to-speech	❌	❌	❌	✅ Every app
Extract action items	❌	❌	✅ Notion only	✅ Any text, every app
Works in Apple Mail	❌	❌	❌	✅
Works in VS Code	❌	❌	❌	✅
Works in Discord	❌	❌	❌	✅
Works in Pages / Notes	❌	❌	❌	✅

Setting It Up

The setup takes about two minutes:

Download WordWand from wordwand.co and drag it to Applications.
Grant accessibility permissions when prompted. This is what allows WordWand to read and write text in other applications. macOS will ask you to enable this in System Settings > Privacy & Security > Accessibility. If you need help with this step, see our accessibility permissions guide.
Set your keyboard shortcut. The default works well, or customize it to whatever combination feels natural.
Start using it. Open Slack, Gmail, Notion, or any other app. Select text, press the shortcut, and choose an action. That is it.

The free tier gives you 5,000 words per month with full access to every feature in every app. No credit card required, no feature gating. If you write enough to need more, Pro starts at $10.99 per month for 50,000 words.

One tool, one shortcut, every app. Try WordWand free at wordwand.co.