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Plate I · a chart of your own thinking

Map your thinking like a night sky.

Every note becomes a point of light. Connect two and Index draws the line between them — until your thinking looks the way it always does at 2 a.m.: a sky full of constellations only you can read.

Start your chartRead a sample chart
014021002037009044018
IDX-014
The talk
IDX-021
Margins
IDX-002
First principles
IDX-037
Reading list
IDX-009
Habits
IDX-044
Sleep
IDX-018
Drafts

Plate II · method

Every note, a fixed point.

Write a note and Index logs it like a star: a designation, a date discovered, a position relative to everything else you’ve written. Reference one note from another and the two are joined by a line — permanent, visible, and easy to trace back at 3am when you can’t remember where a thought came from. IDX-002, above, has the most lines running to it. That’s not an accident — it’s the note everything else keeps pointing back toward.

Plate III · instruments

Take a bearing on anything you’ve written.

Search reads every star in the sky at once — titles, bodies, even notes you connected to years ago. Type what you half-remember and Index plots a course straight to it.

NS

Plate IV · the catalog

Pick how much sky you need.

Observer

Free

For mapping a small patch of sky.

  • ✦Up to 100 stars
  • ✦Manual constellation lines
  • ✦Basic search
Start observing

Cartographer

$8/mo

For charting the whole sky.

  • ✦Unlimited stars and constellations
  • ✦Full-text search across every plate
  • ✦Export your chart, as image or data
  • ✦Revision history for every star
Chart the whole sky
Plate I — Index, a chart of everything you know. Engr. 2026.View all five directions