4D-Signal

The mirror for your digital mind. Live focus signal - on-device, zero uploads, zero accounts.

4D-Signal watches how you move through your work — hesitations, backtracks, rage taps, deep-focus dwells — and reflects it back as a single live Friction Index (CFI). Not a tracker: a mirror. Everything is computed on your device. No keystrokes. No page content. No passwords. No accounts. Your behavioral data never leaves your machine unless you explicitly opt in to a team aggregate — and even then, only counts and averages, never personal signal streams. FREE, FOREVER: the full live mirror — CFI ring, friction signals grouped by type, 7-day on-device history, and a dwell detector that credits deep focus. PRO (one-time license, yours to keep): 90-day trend history, pattern-break alerts, and friction forensics. A license you own — not a subscription to your own data. Built for people who'd rather see their own signals than have someone else sell them.