Atlas Device Sync

Ever built an app and struggled to keep data in sync across devices? 😫

Syncing data across devices is one of the biggest challenges in app development, and can quickly be a mess that can be very difficult to get out of, from dealing with offline users, conflicting changes, to network issues. To summarize, it is a nightmare. BUT, what if I can tell you that there is a tool out there that can resolve all these issues for you and automatically sync your data … what if ?

That’s where MongoDB Atlas Device Sync comes in. It seamlessly and automatically syncs data across users and devices, even where they’re offline, and the best part of all this is that you have to build complex sync logic or worrying about conflict resolution as it is handled automatically also. If you have never heard of this amazing technology, here is what you need to know in a few bullet points.

What is good about Atlas Device Sync ?

⭐️ Effortless Syncing – Changes made on one device magically appear on others.

⭐️ Offline-First Support – Users can work without an internet connection, and changes sync when they’re back online.

⭐️ Smart Conflict Resolution – Built-in logic ensures data stays consistent, even when multiple users update the same data.

⭐️ Efficient Data Transfers – Only deltas (small changes) are sent, reducing network usage.

⭐️ End-to-End Security – Data syncs over TLS 1.3 encrypted WebSockets, with fine-grained permissions.

What’s bad about Atlas Device Sync ?

🔴 Sync pauses after 30 days of inactivity.

🔴 Maximum of 5,000 concurrent sync connections.

🔴 Not yet supported on sharded clusters.

🔴 It can only be used with MongoDB data.

For developers building real-time, offline-first applications, Atlas Device Sync removes complexity, so you can focus on building great features for your users.

Have you tried it yet? Are you thinking of taking a look more in depth ? It looks like an interesting technology right ? Well never mind using it, it’s DEPRECATED, it will reach end-of-life and be removed on September 30, 2025. You can find alternatives on the documentation page 😁