monthletThink. Speak. Done.
The note app where AI writes the note — layout and all. Just speak your mind.
macOS · Apple Silicon
From a messy brain-dump to a structured note.
You use AI every day. But your workflow still looks like this:
Ask AI→copy→paste→format→repeat.
That's not a workflow. That's busywork.
monthlet is different. Three steps, and the AI does the hard one.
Think
Dump your raw thoughts: bullet points, fragments, half-formed ideas. No structure needed.
Speak
Tell monthlet what you want. “Turn this into a note.” Plain language.
Done
AI writes it, choosing banners, columns, tabs automatically. Need changes? Just ask, and only that part updates.
From messy text to a finished note, in one sentence.
Watch monthlet turn a brain-dump into a structured note, then refine it by just asking.
40-second demo, real time.
Not just notes. A whole document, talked into shape.
📊 Spreadsheets
Build and edit real spreadsheets by talking: formulas, formatting, the works.
📈 Live charts
Charts that bind to your sheet data and update as the numbers change.
🎨 Instant themes
Restyle an entire note in one request. No CSS, no fiddling.
📅 Calendar
Browse your notes by month, week, or day. Each day’s daily note is one click away.
Your notes. Forever.
monthlet = anagram of <html> + note
That's not a pun. It's the whole philosophy. Every note you make is a plain HTML file on your machine. Open it in any browser, today or in ten years.
💾 Local-first
Your notes live on your disk, not our cloud. With your own key, your data never has to touch our servers.
🔓 No lock-in
Plain HTML, readable by anything. You're never trapped.
♾️ Outlives us
If monthlet disappears tomorrow, your notes still open. Forever.
The app is free. AI without a key is a service.
The app, free and complete.
- Unlimited notes
- Full AI with your own API key
- 3 providers: Claude, ChatGPT, Gemini
- Local-first: your notes stay yours, forever
Don't want to manage an API key? Subscribe and monthlet runs the AI for you. No key, no setup. Everything else in the app stays exactly the same.
Questions, answered.
Do I need an API key?
Yes, bring your own (Claude, OpenAI, or Gemini). Your data never touches our servers. Prefer not to manage a key? monthlet AI (coming soon) runs it for you.
Which AI providers are supported?
Claude, ChatGPT, and Gemini. All three are first-class. Set up whichever key you already have during onboarding, and switch anytime in settings.
Is my data sent to monthlet's servers?
Never, when you use your own key. Notes stay on your machine; AI requests go straight from your device to your chosen provider.
Is there a note limit?
No. Notes are always unlimited.
What's monthlet AI?
monthlet is free with your own API key. monthlet AI is a subscription that runs the AI for you: no key, no setup. The app itself stays exactly the same. Coming soon. Join the waitlist.
Does it work offline?
Read and directly edit existing notes offline. AI features need a connection.
What if monthlet shuts down?
Your notes are plain HTML files on your machine. They open in any browser, forever.
Which platforms?
macOS on Apple Silicon (M1 or later) today. Windows is on the way (to be released).
Ready to stop formatting and start thinking?
macOS · Apple Silicon