Frequently asked questions

Google (Gmail and Google Workspace), Microsoft (Microsoft 365 and Outlook), Apple iCloud and any CardDAV server. You can connect more than one of each. Your plan sets how many. Google and Microsoft 365: how to sync them. How each account connects: Features › Accounts.

With Google, with Microsoft or with a code we email you. There’s no ContactZapp password. Signing in doesn’t connect your contacts. You connect each account separately.

Hourly, daily or only when you ask. You choose in Settings › Sync, and the choice applies to all your accounts. It starts on Manual only.

Yes. Add someone in Outlook and they appear on your phone. Change a number in one account and it changes in the others. If you want to protect an account, make it read-only: we read it but never change it. Why your contacts don’t sync between accounts.

ContactZapp sees it at that account’s next sync. Then your setting decides: delete the contact in your other accounts too, or keep it there. You can recreate it in the first account later. A contact you delete in ContactZapp is deleted from all your accounts straight away.

Names, email addresses, phone numbers, postal addresses, company, job title, birthday, notes, websites, instant messaging, relationships, labels and photos. Custom fields sync too, with their labels.

It compares email addresses, phone numbers and names using fixed rules. A matching email or phone number makes us much more sure than a matching name alone. Step by step: How merging across accounts works.

You can undo it. Click Undo right after the merge, or roll it back from History later. You get the separate contacts back, not just their old details. Choose Don’t merge once and that pair is never suggested again.

Yes. Run Auto-Merge from Contacts, or turn it on in Settings › Merging and it runs after every sync. You choose how strict it is. It’s off until you turn it on. You can undo any merge from History for 12 months.

Yes. Click Undo right after the merge, or use History later. You can roll back one contact, one sync or everything, to any moment in the last 12 months. The change is sent to your accounts. You can roll back a roll back too.

Yes, any time. Export all your contacts as one vCard file for any other app, or as JSON, which also includes every merge decision. You can also export one account, or a selection, as vCard. Each account keeps up to 5 encrypted backups you can download. Exports never include your sign-in details.

Yes, for each account. Turn a label off and contacts that only have that label stop syncing from that account. A contact with at least one label that’s on still syncs. Nothing is deleted in your account.

Nothing is deleted from your accounts. On a smaller plan, some accounts or contacts may stop syncing. Your contacts in Google, Microsoft, Apple and your CardDAV server stay as they are.

Yes. Your contacts are encrypted with a key that belongs to your account alone. That key is locked by a master key that is never stored in our database. So the database holds counts, statuses and dates, but no readable names, numbers or email addresses.

We never see it. Google and Microsoft connect through their own sign-in. For Apple, you create an app-specific password. Whatever we store to reach your account is encrypted with your account’s key.

On servers in the European Union, for every customer. We may add servers in the Americas and Asia later, closer to customers there.

You can start free, with no time limit and no card. The free plan connects 2 accounts of any size and syncs 100 contacts between them. Paid plans sync more accounts and contacts. Prices are on the Pricing page.

Yes. Ask within 14 days of your first purchase and we refund you, no questions asked.