Answer in 2 sentences
PromptDC's desktop app fixes grammar and rewrites selected text in Slack, Mail, Notion, and any other app where you can select text. Select your draft, press the profile shortcut, review the rewrite, and replace the selection only when the wording and facts are correct.
How do you rewrite text in any desktop app?
Use the same select, shortcut, review loop wherever you can select text. Write a draft in an app, highlight the part that needs work, press the shortcut for the right profile, and read the result before replacing the selection. The tool never sends the message or presses Enter for you.
This workflow does not depend on Slack, Mail, or Notion having a special integration. Those apps are useful examples of ordinary writing surfaces, not a closed compatibility list. The desktop app works in any app where you can select text, including native tools and every browser.
Selection also keeps the task focused. You can rewrite one sentence without exposing the rest of a document, or select a full paragraph when structure needs attention. Before running the rewrite, include enough context for pronouns, dates, and requests to remain understandable.
What everyday writing problems does it solve?
It helps when you know what you mean but the first draft does not express it well. The value is not automatic writing. It is a fast second pass on text you already control.
A Slack reply written while annoyed might be accurate but unnecessarily sharp. Select it and ask for a professional or concise rewrite that preserves the boundary. The calmer version should still say no when no is the intended answer.
An email may need to sound firmer without becoming hostile. A Notion document may contain good ideas buried under repetition. A message in a second language may need grammar correction while keeping the writer's original meaning and level of formality.
These moments share one requirement: the result must preserve facts. Names, dates, numbers, prices, links, and commitments deserve a deliberate check after every rewrite. Better phrasing is not useful if it changes what you agreed to do.
Which writing profile should you use?
Choose the profile that matches the job the selected text needs to perform. A profile is a reusable instruction, so you can move between common writing tasks without explaining the whole request each time.
Grammar
Use Grammar when the meaning and structure are already right. It is suited to spelling, punctuation, agreement, and awkward phrasing, especially for a message written in a second language.
Email and Reply
Use Email to polish a draft you wrote. Use Reply when you select an incoming message and need help composing an answer. The detailed AI email reply workflow explains how to protect commitments and factual details in both cases.
Professional and Social
Use Professional when a rough note needs a business-ready tone without changing its decision. Use Social when the text is intended for a public post and needs a readable hook, tighter structure, or a platform-appropriate rhythm.
Summarize
Use Summarize when a long Notion passage, meeting note, or document needs to become a shorter set of points. A summary can omit nuance, so compare it with the source before relying on it for a decision.
How do you improve a Slack reply written while annoyed?
Remove the heat without removing the boundary. Write the facts and desired outcome first, then select the draft and use Professional or a custom instruction such as “Make this calm and direct. Keep the deadline and refusal unchanged.”
Check whether the rewrite added an apology, concession, or promise you did not intend. Polite language can still be firm. A useful revision states the issue, the decision, and the next action without describing the other person as careless or unreasonable.
If you are replying to a long thread, select only the lines required for context. Old messages, signatures, and unrelated discussion can distract the rewrite. When the situation is sensitive, take a minute before sending even if the revised sentence looks clean.
How do you make an email firmer or a Notion document tighter?
For a firmer email, put the decision early and make the next action explicit. The Email profile can improve the draft, but you should verify that it did not invent a policy or strengthen a tentative date into a commitment. A firm email is specific, not aggressive.
For a Notion document, select one coherent section at a time. Use Professional to improve structure or Summarize to reduce length, then restore any nuance the shorter output lost. Headings, owners, dates, and decision statements should remain easy to scan.
You can use a one-off instruction when no standard profile fits. The guide to custom Actions and per-app profiles explains when a temporary instruction is better than saving another preset. If the same Notion cleanup recurs, save it as a profile and assign a shortcut.
How does this compare with Grammarly?
Grammarly is the better fit if you want continuous inline suggestions and plagiarism checking. It watches supported writing surfaces as you type and can flag issues without requiring you to select a passage first. That is a different interaction model from an on-demand rewrite.
This desktop workflow acts only when you select text and press a shortcut. In return, it works through the system selection in any app where you can select text, including native apps Grammarly does not reach. The Grammarly alternative overview describes the broader distinction, while PromptDC vs Grammarly compares the products directly.
Neither model is universally better. Choose Grammarly for persistent inline assistance and plagiarism features. Choose selection-based rewriting when you want deliberate profile-driven changes across many apps and prefer to trigger each one yourself.
What should you not do with an AI rewriting tool?
Do not treat a cleaner sentence as proof that the content is correct. The rewrite should improve expression, not decide what happened or what you can promise.
- Do not paste confidential customer data, credentials, private health information, contract details, or material your organization forbids you to send to a hosted AI service.
- Do not let the model invent dates, reasons, policies, prices, quotations, or evidence that was not in your draft or source.
- Always read the complete result before you replace the selection, send the message, or publish the document.
Minimize the selected context when sensitive material is nearby. If a name or account detail is not needed for the rewrite, remove it first. Your employer's data policy still applies when the workflow feels as simple as a keyboard shortcut.
How do you start using the desktop writing workflow?
Start with one low-risk paragraph whose facts you can easily verify. Visit the download page, install the desktop app, grant the required macOS Accessibility permission if you are on a Mac, and choose a profile shortcut. Windows users can use the same selection-based process on Windows 10 or 11.
The writing overview is a useful map of the available profiles and common tasks. Non-native speakers can also read the guide to AI grammar for second-language writing. If you mainly write in Chrome, the comparison of the desktop app and Chrome extension helps you decide whether to install one surface or both.
Use rough drafts on purpose during the first few attempts. A profile should make the intended meaning clearer, not make you spend extra time polishing text before the tool sees it. The final review remains yours.
Bottom line
Select the text that needs work, press the most relevant profile shortcut, and review the result before replacing it. Grammar, Email, Reply, Professional, Social, and Summarize cover different everyday moments in apps like Slack, Mail, and Notion, plus any other app where text can be selected. Grammarly is stronger for continuous inline suggestions and plagiarism checking, while this workflow is on-demand and reaches native apps. Whichever tool you choose, protect confidential information and verify every fact before sending.
FAQ
Can AI fix grammar directly in Slack?
Yes. Select the draft in Slack, trigger the Grammar profile with the desktop app, and review the rewritten version. Slack is one example, and the same loop works in other apps where text can be selected.
Can I rewrite an Apple Mail message without copying it into a browser?
Yes. Select your draft in Mail and use the desktop shortcut. Review the result before replacing the selection, and send it yourself when it is accurate.
Does the desktop app work in Notion?
Yes. You can select text in the Notion desktop app or in Notion opened in a browser. Work section by section when a page is long so the intended context stays clear.
Is this the same as Grammarly?
No. Grammarly offers continuous inline suggestions and plagiarism checking, while this tool rewrites a selection when you trigger it. The selection-based approach also works in desktop apps that an inline browser assistant may not reach.
Which profile should a non-native English speaker use?
Use Grammar when your meaning is correct and you want language corrections. Use Professional or Email when the message also needs a different structure or tone, then check that the rewrite still expresses your intended meaning.
Does the app send a rewritten message automatically?
No. It returns a rewrite for you to review and decide whether to replace. You remain responsible for pressing Send or Enter.
