Lumly Lumly

Ask AI better, without learning how.

Prompty is a small agent that lives at the top of your Windows screen. You tell it what you want in plain words. It asks what's missing, writes a proper prompt for Claude, ChatGPT, Grok or Perplexity, sends it in the app, and checks the answer.

Download for Windows Prompty-Setup.exe · v0.46 · 65.9 MB · Windows 10 & 11 · free plan included Is it safe to install? Read this first →
Works with the Claude, ChatGPT, Grok and Perplexity apps you already have.
The Claude agent: an orange round face with three small antennae
Prompty resting as a small face
Resting. Just a face.
Prompty showing Working in the AI app
Working in your AI app.
Prompty chat open with a request for a LinkedIn post
Chat open. Real screenshot, v0.45.
demo · 58 sec

Prompty Demo

Here's the whole thing in under a minute. Most people type one short line into ChatGPT and take whatever comes back. Prompty does the part you'd skip: it adds the details, picks the right format for that AI, and asks again when the answer isn't good enough.

  1. Move your mouse to the top of the screen.Your agent drops down. Or press Ctrl Alt P.
  2. Say what you want, messy is fine."linkedin post about my new product". Type it, or speak it on Plus and Pro.
  3. It asks one or two questions.Only if something important is missing, like who it's for or how long it should be.
  4. It opens a fresh chat and sends the prompt.A purple frame shows while it's using your mouse and keyboard. Click it to stop.
  5. It reads the answer and pushes back.If the reply misses something, it sends a follow-up. The best answer gets a frame.
why it helps

Same request. Very different prompt.

An answer is only as good as the question. Each AI also prefers a different style: Claude works well with clearly tagged sections, ChatGPT with headings and numbered steps. Prompty knows the difference so you don't have to.

what you type8 words
write a linkedin post about my new product
what Prompty sends to Claudeafter 2 questions
<role>You write LinkedIn posts for small founders.</role>
<task>Announce Prompty, a desktop agent that writes
better prompts for Claude and ChatGPT.</task>
<audience>Founders who use AI every day but get
average answers.</audience>
<format>Under 150 words. A strong first line.
Three short paragraphs. End with one question.
No hashtags.</format>

Example for illustration. What you get back depends on the AI and on your request.

features

One agent for each AI

Claude, ChatGPT, Grok and Perplexity each get their own agent, and each one knows how its AI likes to be asked. Switch between them from the bar.

You can also dress them up. There are 29 hats and accessories, from a party hat to a wizard hat to a tiny sprout.

The Cosmetics tab showing the four agents and a grid of accessories
Cosmetics tab, v0.45
The Claude, ChatGPT, Grok and Perplexity agents in top hats, cowboy hats, Santa hats, chef hats, bunny ears and more
The Custom agents tab with a Gmail writer and an Instagram captions agent
Custom agents tab, v0.45

Custom agents for jobs you repeat

Pick a job and an app, like "Gmail writer" or "Instagram captions". Prompty remembers how you want that job done, writes your prompts for it, and opens the app when the answer is ready.

Custom agents open the app for you. They don't read your inbox and they don't post anything for you.

A fresh chat every timeOld messages don't leak into your new request.
App shortcuts in the barYour four favourite apps, one click away.
Voice, in up to 18 languagesOn Plus and Pro. Hebrew, Spanish, Arabic, Japanese and more.
Usage, history and a weekly recapSee what you asked and how much you've used.
Tray icon and Start with WindowsBoth optional. Turn them off in Settings.
Updates ask firstPrompty never updates itself without asking. You pick "Update now" or "Later".
before you download

What Prompty does on your computer

Prompty uses your mouse and keyboard and reads your screen, so it's fair to ask what it actually does. Here's the plain list.

QuestionAnswer
When does it use my mouse and keyboard?Only after you send a request, to open a new chat, paste the prompt and press Enter. A purple frame is on screen the whole time.
What does it look at?Screenshots of your AI app's window, only while it's working on your request, to read the answer.
Does it watch my screen in the background?No.
Where does that go?Through Lumly's server to Anthropic's AI, which reads the answer. Your account and usage are stored with Supabase.
What does it save on my PC?Settings and history in %APPDATA%\Prompty.
Can I remove it?Yes. Settings → Apps → Installed apps → Prompty → Uninstall.

You'll probably see this warning

Windows protected your PC
Microsoft Defender SmartScreen prevented an unrecognized app from starting. More info
Don't run
Illustration of the Windows warning.

This shows for new apps that aren't code-signed yet, which costs money and takes time for a small company. Click More info, check that it says Prompty-Setup.exe, then click Run anyway. Code signing is on the list before launch.

Check the file yourself

This is the SHA-256 of Prompty-Setup.exe v0.46. If yours matches, it's the exact file we published.

5a45ce37f27f232294479c576a90e78ba9359f1b648b14cde31967d5c177d933

In Command Prompt: certutil -hashfile Prompty-Setup.exe SHA256 · or look it up on VirusTotal

who makes this

Built by one person in Tel Aviv

I started Prompty because most people don't know how to write a good prompt, and it's the difference between an average answer and a great one. The first version was a Python script running in a black Command Prompt window. Prompty has come a long way since.

Lumly is just me for now. If something breaks or you have an idea, you're writing straight to the person who builds it, and I read everything.

Jonathan, founder of Lumly

Try it on your PC

Download for Windows v0.46 · 65.9 MB · free plan included · install steps · on a Mac? join the waitlist