# kristine

> Every contact is fingerprinted with SHA-256 so only changes are transferred — no wasted bandwidth. When two devices edit the same contact, a three-way merge ….

Every contact is fingerprinted with SHA-256 so only changes are transferred — no wasted bandwidth. When two devices edit the same contact, a three-way merge engine computes what each side changed against a shared baseline. Array fields like phones and emails merge automatically; scalar conflicts are flagged for your review. Sync triggers automatically on app open, via pull-to-refresh, or with a manual Sync Now button. Kristine preserves every native contact field: multiple phones, emails, addresses, dates, social profiles, instant messaging, relations, URLs, notes, birthday, company, job ti…

## Key sections
- Your Contacts. Every Device. ==Always in Sync.==: Kristine is a cloud-first contact manager that backs up your entire native address book, syncs edits across every device with a three-way m…
- ==Intelligent== Sync Engine: Every contact is fingerprinted with SHA-256 so only changes are transferred — no wasted bandwidth. When two devices edit the same contact, …
- Your ==Complete== Address Book: Kristine preserves every native contact field: multiple phones, emails, addresses, dates, social profiles, instant messaging, relations, UR…
- Powerful & ==In Your Control==: When two devices edit the same field differently, Kristine flags the conflict and lets you choose which value to keep — per field, not per …

## Links
- [==Intelligent== Sync Engine](https://www.kristineapp.com/#section-2)
- [Your ==Complete== Address Book](https://www.kristineapp.com/#section-4)
- [Powerful & ==In Your Control==](https://www.kristineapp.com/#section-6)