CONTACTS
Full access (Read/Write) to the device's contacts.
Android:
READ_CONTACTS+WRITE_CONTACTS.iOS:
NSContactsUsageDescription.
Android 17 note: for read-only "pick a few contacts" use cases, prefer the new permission-free Contact Picker (ContactsPickerSessionContract.ACTION_PICK_CONTACTS, ephemeral session URI — no grant involved, so Grant is not needed for it). Google Play policy is moving to reserve READ_CONTACTS for apps that genuinely cannot function without ongoing full access.