Mobile & Wearable Apps

Stop fighting the cloud. Build mobile apps that actually work for your users.

You're building for the devices people carry everywhere — smartphones, tablets, Apple Watches, fitness trackers. But you're still stuck with infrastructure that breaks the moment users step into a subway tunnel or board a plane.

These devices are powerful computers. Why are you still dumping everything into the cloud?

Source's edge-first data infrastructure changes that. With DefraDB, your apps gain a fully embedded, verifiable database that runs natively on-device, supports real-time peer-to-peer sync, and eliminates the need for server-side complexity. It's the easiest way to build offline-first, secure, and collaborative experiences — with no compromise.

The problem you already know

Mobile development shouldn't be this hard, but it is:

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Your users expect apps to work everywhere — but handling intermittent connectivity, sync conflicts, and offline state is a nightmare

Cloud-first architecture means latency, downtime, and zero user control over their own data

You're building backends when you'd rather be building features

Real-time sync is a nightmare of race conditions, conflicts, and edge cases

Privacy regulations turn every data flow into a compliance headache

You didn't become a mobile developer to become a backend engineer. But that's what the current stack forces you to do.

What if your app just... worked?

DefraDB gives you a real database that runs directly in your mobile and wearable apps.

No more "the app needs internet to work." No more building sync logic from scratch. No more choosing between user privacy and app functionality.

Here's what changes:

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True offline-first

Your app works perfectly whether users are on WiFi, cellular, or airplane mode

Automatic P2P sync

Data flows directly between users and devices — no servers required (but you can add them if you want)

GraphQL queries

Query your local database exactly like you'd query any GraphQL API

Conflict-free by design

Multiple users editing the same data? CRDTs handle merges automatically

User-owned data

End-to-end encryption and granular permissions mean users control their information

Time-travel debugging

See exactly what happened to any piece of data, when, and why

What This Actually Means for Your Development

You save weeks of development and debugging

Read the Docs

Run your full data layer in the app itself

Cut infrastructure and DevOps overhead — no sync service to build or maintain

Fast, responsive UIs powered by local data access

Zero-trust architecture means every update is signed and verified

GraphQL queries and schemas reduce boilerplate and increase consistency

Works with React Native, Flutter, Swift, Kotlin, and whatever you're already using

Built for the realities of mobile and wearable devices:

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Small memory footprint

Runs on older devices and Apple Watches without breaking a sweat

Delta-based sync

Minimizes data usage so you're not burning through users' cellular plans

Field-level permissions

Granular access and sharing controls that actually work

Time-travel queries

Implement undo/redo and versioned views without custom logic

Zero-knowledge proofs

Verify data claims without exposing sensitive content

Compiles to WASM or native code

Deploy anywhere your app runs

Build Edge-first, Cloud-last

Source helps developers build beyond the cloud

Build Beyond