Real cross-source sync
Connect Google today; iCloud and Outlook next. True incremental delta sync — not a constant full re-fetch that resurrects deleted contacts.
Contact hygiene + sync hub
Roster syncs your accounts, finds the duplicates scattered across them, and merges them into one clean record — reversibly. Built for people whose contacts are spread and doubled across Google, iCloud, and Outlook.
Private alpha. Google sync live today — iCloud and Outlook next.
Duplicates pile up. The same person, three times, slightly different in each account.
Edits desync. You fix a number on your phone; the old one reappears next sync.
It grinds at scale. Thousands of contacts and the built-in apps crawl.
Roster isn't a prettier address book. It's the sync engine and the dedupe engine — the work Apple and Google leave unsolved.
Connect Google today; iCloud and Outlook next. True incremental delta sync — not a constant full re-fetch that resurrects deleted contacts.
Field-level survivorship folds duplicates into one golden record, and every merge is undoable. No irreversible auto-merge eating your data.
vCard and CSV in and out, anytime. Your contacts are yours — bring them in, take them with you, no lock-in.
Read-only access to your accounts, OAuth tokens encrypted at rest, and per-user database isolation. We never sell your data or use it for ads.