Vinci turns your Android contacts into a lightweight personal CRM; no new silo, no cloud account required. It reads directly from your existing contacts (DAVx5, Nextcloud, anything), and layers relationship tracking on top: interaction logging, follow-up reminders, birthday alerts, social profile links, and notes per contact. You can even log interactions with numbers not in your contacts. Free, open source (GPLv3), no ads, no telemetry