Paste the two values from your Supabase project (Settings → API). They're stored on this device only, and the same two go on every device you want in sync.

Enter your email, press Send code, then type the 6-digit code from the email below. (No need to tap the email's link — the code is more reliable, especially on iPhone.) Use the same email on your phone and desktop.

Tap a category to grant or revoke it for that person. Changes save instantly.