Plain Markdown. Private by default. Yours for good.

On Mac, iPhone, iPad, Android & Web

Rooooooom to write.

Real headings, generous margins, and clean Markdown underneath. Nothing between you and the sentence you're chasing.

Ideas overlap.

One note can belong to many places. Nest them, color them, use whole phrases, find them by feel.

Here. There. Everywhere.

Your notes start on this device, no account needed. Sign in and they are in sync the moment you look away: start on your Mac, finish on your phone.

Your notes are nobody's business.

Write without an account and nothing leaves your device. Sign in and Caliu syncs your notes encrypted, and never sells a word.

How we treat your data

A mood, not a menu.

Pick from twenty-two hand-crafted palettes and thirty fonts until the page feels like yours. Keep one look for the day and another for the night.

Long-term memory.

Caliu keeps snapshots as you write. Scroll back through a note's life, preview any moment, and bring it back in a tap.

Notes that talk back.

A proper JSON API, an MCP server, and every note reachable by your tools. Let Claude or Cursor read, write, and organize on your terms.

GET /notesPOST /notesGET /tagsDELETE /notes/:id
Explore the API

Free until you want more.

Help support Caliu's development and unlock extra features.

Free

  • Local-first notes, no account needed
  • Sync across devices
  • Up to 50 notes
  • Export to TXT and Markdown
  • 3 themes and 7 fonts
  • 1 GB of attachments
  • Note version history
  • Drawing and handwriting (iPhone and iPad)
  • Claude, ChatGPT and other AI apps, plus 1 API key

CaliuPro

  • Local-first notes, no account needed
  • Sync across devices
  • Unlimited notes
  • Export to PDF, HTML, RTF, ePub + bulk
  • All themes, fonts and app icons
  • Unlimited attachments
  • Note version history
  • Drawing and handwriting (iPhone and iPad)
  • Claude, ChatGPT and other AI apps, plus unlimited API keys

Includes a free trial, then

$2.99/mo$17.99/yr-50%

Or buy once, keep it forever

$44.99$64.99Launch price

We aim to set a fair price for Caliu Pro to fund regular updates and future development.

Prices may vary with your country's currency and taxes.

Start writing…No setup. No clutter. Just your thoughts, kept warm.