# An Object Sync Engine for Local-first Apps

DevFeed: [An Object Sync Engine for Local-first Apps](<https://devfeed.tech/articles/an-object-sync-engine-for-local-first-apps-81416.md>)

Original publisher: [Read original article](<https://stack.convex.dev/object-sync-engine>)

Author: Stack

Published: 2024-11-13T11:00:00Z

Content type: article

Language: en

Sources: [Stack](<https://devfeed.tech/sources/stack.md>)

Topics: [Test-driven development](<https://devfeed.tech/topics/tdd.md>), [Realtime Database](<https://devfeed.tech/topics/realtime-database.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [code](<https://devfeed.tech/tags/code.md>), [local-first](<https://devfeed.tech/tags/local-first.md>), [perspectives](<https://devfeed.tech/tags/perspectives.md>), [sync](<https://devfeed.tech/tags/sync.md>)

## AI overview

The article explains how object sync engines keep application data synchronized between local clients and a centralized server for local-first apps. It compares approaches used by Replicache and LunaDB, then describes Convex's design for local storage, sync protocols, schemas, optimistic mutations, and server-side queries.

## Source excerpt

Object sync engines manage a rich object graph across multiple clients and a centralized server and are a great fit for building local-first apps.