01
Your focus gets lost between tabs.
Copy the message. Open a chat. Explain the context. Copy the result back. One reply becomes a detour.
Reply, fix, translate, and much more.
Highlight text in a supported app and pick a mode from the toolbar beside it: reply, improve, check, translate, summarize, explain, or a prompt of your own. Edit the result before you use it.
Windows 10 or newer · macOS 14 or newer
ReplyNavMail
TEXT
Hi Alex, I’ve attached the revised proposal with the updated timeline. Could you review the scope and send any comments by Thursday afternoon?
Writing
- 01Works from selected textIn supported applications, using the text you highlight.
- 02Your choice of AIA cloud provider with your own key, or Apple Intelligence on your Mac.
- 03You stay in control before sendingYou choose the action that sends text to a provider.
- 04No automatic message sendingReplyNav writes the draft. Sending stays with you.
A better writing workflow
You know what to say. It just takes too long.
The hard part should be what you want to say. Not moving text between tools to say it.
02
Writing a reply from scratch takes time.
You know the answer. Finding the right tone and the right words is what slows you down.
03
Small mistakes interrupt your flow.
A typo, an awkward sentence, another language. Each one takes you away from the conversation.
How it works
Three steps, right where you work.
Select text, open ReplyNav with the toolbar or your shortcut, and choose what to do with it.
Select your text
Selected message
Thank you for the updated proposal. Could you confirm whether post-launch support is included? We’ll share our feedback by Thursday afternoon.
Selected in Mail. Open ReplyNav to choose a mode.
Modes
Built-in modes and your own prompts.
Choose a mode to see what it produces from a real selection. The toolbar offers the last one you used first, and the rest are one click away.
Interactive product demo01 / 08
Selected message
Hi Alex, I’ve attached the revised proposal with the updated timeline. Could you review the scope and send any comments by Thursday afternoon?
ReplyNavPROMail
TEXT
Hi Alex, I’ve attached the revised proposal with the updated timeline. Could you review the scope and send any comments by Thursday afternoon?
Contextual replies
Reply with the context already in front of you.
ReplyNav starts from the message you selected, not from an empty prompt where you have to explain everything. It adds the tone, length, and language you chose, and your personal context if you filled it in.
Quick one: the design handover slipped again and QA starts Monday. Can we still hit the release date, or should I warn the stakeholders today?
I would warn them today rather than wait. With the handover slipping and QA starting Monday, the release date is at risk, and I do not want to confirm it before I have seen where QA lands. I will give you a clearer answer after the first test run on Monday.
The message is the prompt
The selected text is captured as data and fenced off, so instructions inside a message cannot redirect the model.
Say what the reply should do
Agree, decline, ask a question, or propose an alternative, and add a date or reason where one is needed.
Keep the conversation together
Add earlier messages to the context from the toolbar, so a reply answers the whole thread and not only its last line.
Refine without starting over
Make the draft shorter, softer, more specific, or less formal without starting over. Earlier versions stay one click away.
Quick actions, optional
Correct, improve, or translate right where you type.
With nothing selected, a small toolbar appears beside supported text fields on Windows and macOS. One click corrects, improves, or translates the whole field and puts the result back where it was.
New message
Hi Tom, i wanted to reach out regarding the quaterly report. We was unable to finish the review yesterday, we will send it tomorow.
You stay in control of where it runs
- Off until you turn it onQuick actions start switched off. Typing alone never sends text: only the action you click does.
- One click backUndo quick action restores the text the field had, as long as nothing changed it since.
- Turn it off where you need toFor an hour, in one application, or everywhere, from the toolbar menu, the tray, or Settings.
- Never in protected fieldsPassword fields and other protected fields are skipped before any text is read.
Pick text on macOS
Take the text straight from the screen.
When text cannot be selected, Pick text lets you click a text block or draw an area for local OCR. Capture several pieces in order, then use them as text or context.
Team chat
- Capture text in the order you needClick a text block or draw an area; each capture is numbered. Review, reorder, or remove captures before using them, and scroll to find more.
- Use it as text or contextUse the captured text for an action, or add it to the context of a reply that is already open.
Text mode reads text exposed through macOS Accessibility. Area mode uses local OCR on the region you draw and requires Screen Recording permission.
Make it yours
Your prompts, your shortcuts, your colours.
ReplyNav adapts to the way you write: prompts of your own beside the built-in modes, a shortcut for each mode, colour themes, and personal context it uses only where it helps.
PromptsPRO
- Tweet
- Meeting notes
- Code review
Icon
Themes
System, Light, and Dark themes are included for everyone. Darcula, Ember, Lagoon, Parchment, and Grove are part of Pro. Choose one to preview it in the app.
ReplyNavPROMail
TEXT
Thank you for the updated proposal. Could you confirm whether post-launch support is included? We’ll share our feedback by Thursday afternoon.
- A shortcut per modeCtrl + Shift + R opens the window; Ctrl + Shift + 1 to 9 open it with a mode already running. Every shortcut can be changed.
- Personal contextYour name, role, preferred writing style, and standing instructions, sent only with actions that write on your behalf.
- Text size at your fingertipsHold Ctrl (⌘ on a Mac) and turn the wheel to make the text bigger or smaller. ReplyNav remembers the size.
- Supported languagesEnglish, Ukrainian, Russian, Polish, German, French, Spanish, Italian, Portuguese, and Turkish.
First launch
Your AI. Your choice.
Choose a cloud provider and enter your own API key, or, on a Mac with Apple Intelligence, use the model built into macOS with no key at all.
- Each provider keeps its own model and key, so you can switch between them without re-entering anything, even for a single answer.
- Keys go into Windows Credential Manager or the macOS Keychain, never into the settings file and never into logs.
- Cloud usage is billed to your own provider account. Apple Intelligence runs on your Mac and costs nothing to use.
ReplyNav01 / 02
First launch
Connect your AI provider
Select a provider to preview setup
Your API key—
Enter your key in the desktop app. This is a preview.
Keys are stored in Windows Credential Manager or macOS Keychain.
Model names, availability, and provider pricing change often, so they are not listed here. Check your provider for current details.
Free and Pro
Start free. Unlock Pro when you need more.
The everyday modes work without a licence. Pro adds the modes, models, and options that heavy writers reach for, and a licence key activates it in Settings.
Free
Everything you need for everyday writing.
- Reply, Improve, Check writing, Translate, Summarize, and Answer
- Quick actions and the selection toolbar
- Neutral, professional, and friendly tones
- The standard model of every provider, and Apple Intelligence
- Context you paste by hand
- Pick text on a Mac, one block at a time
- System, light, and dark themes
PRO
For people who write all day.
US$29
One-time purchase · no subscription
- Explain, with Answer more carefully for a slower, more thorough answer
- Prompts of your own, run like built-in modes
- Every model, including the most capable ones
- Concise, diplomatic, and direct tones
- Messages you pick saved as context for the whole conversation
- Pick text with several blocks at once
- More themes
- Hide ReplyNav from screen sharing
Checkout by Paddle, our merchant of record, which handles payment, invoices, and tax.
Activate a licence in Settings → About. Prompts you write without one are kept, ready for the day you activate it. Lost your licence key?
Privacy and control
You decide what leaves your computer.
In plain words, and only what ReplyNav actually does:
Text is sent only after an explicit action
Selecting text, typing, and hovering send nothing. A request starts only when you choose a mode or a quick action.
Your text goes only to your AI provider
ReplyNav sends the selected text and your settings only to the AI provider you connected, using your own key. With Apple Intelligence, the text never leaves your Mac.
API keys are kept safe by the system
API keys are kept in Windows Credential Manager or the macOS Keychain, with a DPAPI-encrypted fallback for your user account where Credential Manager is unavailable.
ReplyNav does not send messages
It produces drafts. Pressing send in your mail or chat app stays your action.
Hidden from screen sharing, if you want
With Pro, ReplyNav’s windows can be kept out of screenshots and screen shares that respect the system’s capture protection.
How it compares
Not a chat: a tool for the text you are working on.
| Capability | ReplyNav | Generic AI chat | Basic grammar checker |
|---|---|---|---|
| Works from selected textStarts from what you highlighted, in place. | Yes | No | Partly |
| Contextual reply generationDrafts an answer to the message itself. | Yes | Yes | No |
| Writing correctionSpelling, grammar, punctuation, clarity, tone. | Yes | Partly | Yes |
| Tone and length controlsSet as controls rather than described in a prompt. | Yes | Partly | Partly |
| Copy or insert on demandInsert the result back into the original app only when you choose to. | Yes | No | Yes |
| Prompts of your ownSaved once, run from the toolbar on any selection. | Yes | Partly | No |
| User-selectable AI providerYour own account and API key, or a model on your Mac. | Yes | No | No |
- Yes Available in ReplyNav or commonly offered by this type of tool
- Partly Partly, or depends on the product
- No Not what this kind of tool is built for
Columns describe categories of tool, not specific named products. Individual products differ.
FAQ
Something not answered here? hello@replynav.com
What is ReplyNav?
A small desktop application for Windows and macOS that works on the text you select in another app. A toolbar appears beside the selection, and a global shortcut opens the same window: reply, improve, check writing, translate, summarize, explain, carry out a request, or run a prompt of your own, then edit the result before you use it. It runs from the system tray or the menu bar. It is not a chatbot: each answer stands on its own.
Which applications does it work with?
It is designed to work wherever you can select text, including mail, chat, browsers, and editors. Compatibility depends on the editor and on how it behaves with the operating system accessibility APIs, so it is not guaranteed for every application or every field. When capture does not work, ReplyNav opens anyway and gives you a paste field, and you can always copy the result and paste it yourself.
Does ReplyNav send messages automatically?
No. ReplyNav writes drafts. It never presses send in your mail or chat application. Inserting a result back into the field you came from is a separate action you choose each time, and Copy always works.
Which AI providers are supported?
DeepSeek, OpenAI, Gemini, Claude, and Grok, each with your own API key on your own provider account, so usage is billed to you directly rather than through ReplyNav. On a Mac with macOS 26 or newer that supports Apple Intelligence, you can also use the model built into macOS: no key, no account, and the text stays on your Mac. Model availability and pricing change often, so check your provider for current details.
What is the difference between Free and Pro?
The free version covers everyday writing: six of the seven modes, quick actions, three tones, the standard model of each provider, and Apple Intelligence. Pro adds Explain, prompts of your own, every model, three more tones, context saved for each conversation, more themes, and hiding ReplyNav from screen sharing. A licence key activates Pro in Settings.
How do I activate Pro after buying it?
Right after checkout the page shows your licence key, and the same key arrives by email. Open ReplyNav, choose Settings → About, paste the key and choose Activate. Pro unlocks at once, works on the computers you use yourself, and has no expiry. Lost the email? The site can send the key again to the address you bought with.
Can I add my own prompts?
Yes, with Pro. Give a prompt a name, an icon, and an instruction in Settings → Prompts, and it appears in the toolbar menu and in the mode list beside the built-in modes. You can write prompts without a licence; running them needs one, and the prompts you wrote are kept.
Can I disable quick actions and the toolbar?
Yes. Quick actions start switched off. The selection toolbar can be turned off for an hour, for one application, or everywhere, from its own menu, the tray menu, or Settings. The global shortcut keeps working either way.
Is macOS supported?
Yes. ReplyNav runs on macOS 14 or newer as well as Windows, with the same toolbar, modes, and quick actions. On macOS it lives in the menu bar and stores keys in Keychain. It asks for Accessibility access to read selected text and show the toolbar. Pick text’s Area mode also asks for Screen Recording access and recognizes the area you draw locally. Apple Intelligence needs macOS 26 or newer.
Does ReplyNav cost anything?
ReplyNav is free to download and use, and Pro is a one-time purchase with no subscription that unlocks the features listed above. Refunds are available for 14 days. Beyond that, it is a client for the AI provider you choose: with a cloud provider you supply your own API key, and whatever that provider charges for your requests is billed to your account with them, not to us. Apple Intelligence costs nothing to use.
What happens when ReplyNav cannot capture or insert text?
It tells you, instead of failing quietly. If the selection cannot be read, the window still opens with a paste field so you can continue by hand. If a result cannot be inserted, for example into an application running with elevated rights, ReplyNav reports that and offers Copy instead. Where a quick action cannot replace the text safely, it offers the corrected text to copy rather than writing into a field it cannot verify.
Spend less time finding the right words.
Install it, connect a provider once, and work from the toolbar or the shortcut.
Finding the right installer…
Other versions
Detection can be imperfect. Every available installer is listed below.
Windows
Windows 10 or newermacOS
macOS 14 or newer
Free to download and use; Pro features need a licence. Cloud providers bill usage to your own account, and Apple Intelligence on a supported Mac costs nothing.