| Anthropic | AI assistant (Claude) — generates responses to user queries and parses forwarded emails for calendar events | Message text, images, forwarded email content, calendar events, family context (names, schedule) | USA |
| Google | Authentication (Google Sign-In) and calendar sync (Google Calendar API) | Google account email, OAuth tokens, calendar events (read/write) | USA |
| Google Firebase (Cloud Messaging) | Push notifications — delivers the alerts you turn on to your devices | Device push tokens and the text of each notification, which may include a to-do title | USA |
| Supabase | Database and authentication — stores all persistent app data | Account info, family profiles, member names, calendar connection tokens, to-dos, AI usage logs | USA (AWS us-east-1) |
| Vercel | Web app and API hosting | Request logs (IP address, route, timestamp) retained briefly for debugging | USA / global edge |
| Resend | Inbound email receipt (forwarded emails to @kinday.ai) and outbound email delivery (Sunday briefings, confirmation replies) | Email subject, body, sender address, recipient address | USA |
| Brave Search | Web search used by the AI assistant for local activity and weekend suggestions | Search query text only — no personal identifiers are included in queries | USA |
| Cloudflare | DNS and email routing for kinday.ai | DNS query metadata, email routing headers | USA / global |