About WatermelonDB
WatermelonDB is an open source reactive database framework for React and React Native apps. It stores data in SQLite and loads records only when they are needed, which helps apps with large amounts of data start quickly.
What it does
Queries run directly on the native SQLite database on a separate thread, so most of them resolve quickly. The database is observable, which means components re-render automatically when the records they depend on change. The framework is offline first and can sync with your own backend when a connection is available.
Key features
- Lazy loading of records
- Reactive queries that update the interface
- Offline first with sync to your backend
- Runs on iOS, Android, Windows, web and Node.js
- Optional RxJS API and TypeScript types
Who it's for
WatermelonDB suits React Native teams building apps with thousands of records. It also fits developers who need offline data and want a database that updates the interface on its own.
Pricing and good to know
WatermelonDB is open source under the MIT license. The site says it powers Nozbe Teams and other production apps. Setting up sync with your own backend is your job, so plan the server side before you build the client.
Highlights
- Load records only when the app needs them
- Update components automatically when data changes
- Work offline and sync with your own backend
- Use the optional RxJS API or TypeScript types
