Grocer doesn't have user accounts, and that's on purpose: your lists live in your own iCloud, in a private database only your devices can read.
What this means in practice
- No password, no sign-up. Being signed in to iCloud on your iPhone is all it takes.
- Sharing uses Apple's sharing. Inviting someone to a list uses the same private iCloud sharing that Notes and Reminders use. Grocer's servers never hold your list contents.
- Sync is automatic and usually instant. Changes travel from your device to iCloud to everyone else's devices.
- Your data follows your Apple ID. New phone, same lists — nothing to migrate.
What Grocer's own servers do
A small Grocer service handles the things iCloud can't: looking up aisles and prices at your store, reading items out of photos, and delivering Live Activity updates. These requests carry the item names being looked up and the store you've chosen — never your whole list or your device's location. See What Grocer can see.
Requirements
- An iCloud account with iCloud Drive enabled (iOS Settings → your name → iCloud).
- Enough free iCloud space — lists are tiny, so even the free 5 GB tier is plenty.