Save the people you call with a photo, numbers, email, company and notes. They sync to your Mac, iPhone and iPad, and every call shows who it is.

Shown with demo accounts and sample numbers.
When a call comes in or goes out, SIPdia looks the number up in your contacts. A match shows the contact's name and photo on the call screen, in the floating incoming-call window on the Mac, and in Recents. From Recents you can open the contact, or add a number that isn't saved yet.

Contacts are tied to the SIPdia account you sign in with, not to a SIP account. Add someone on the Mac and they appear on your iPhone and iPad. Each device keeps its own copy, so caller names still show without a network, and changes catch up when the device is back online. See the privacy policy for exactly what the server keeps.
On every device where you sign in to SIPdia, and on the SIPdia server with your account, so a contact added on the Mac appears on your iPhone and iPad. If the same contact changes on two devices, the newest change wins.
Only when you choose Import from Contacts, and it keeps only the contacts it imports. Otherwise SIPdia uses its own contact list. Importing is part of SIPdia Premium.
Import reads vCard files (versions 2.1, 3.0 and 4.0, from Apple Contacts, Google Contacts or Outlook) and CSV files with the columns Google Contacts and Outlook use. Export writes vCard 3.0 with photos, or CSV. Import and export need SIPdia Premium.
By phone number. Long numbers match on their last digits, so a contact saved as 01711000000 is found for a call from +880 1711-000000. Short PBX extensions match exactly.
No. Adding, editing, photos, favorites and sync across your devices are in the free plan. Only importing and exporting need Premium.
Delete it on any of your devices; the deletion syncs to the others. Delete Account in Settings removes all your SIPdia contacts from the server and the device.
Bring the SIP account you already have. The Mac and iPhone apps are in release preparation; download links appear on the download page when each release is live.