Relationship Radar v1.2
Austin Arnold, austinarnold.io

Two paste-in installs, done in order. The Installation Guide walks through both.

Part one, the Sheet (the engine)
  Code.gs           paste into the Sheet's Apps Script editor, replacing the default Code.gs
  appsscript.json   paste into the Sheet project's manifest, replacing everything in it

Part two, the Gmail card
  Card.gs               paste into a NEW standalone Apps Script project's default Code.gs
  Card-appsscript.json  paste into that project's appsscript.json, replacing everything in it

Engine 1.2.0. Gmail card 1.1.0. Guides: v1.3.
Install and use it at your own risk. Start in Demo Mode before any real name goes in.
