Best Database for Mobile Backends
ormDB is a relational database engine written in Rust that powers mobile backends with graph fetches that return complete screen data in single round-trips, native change streams for real-time push updates, and row-level security for per-user data isolation. It consolidates relational storage, vector search, and full-text search into one database, reducing mobile backend complexity. It is in Alpha v0.1.0 under the MIT license.
Why Mobile Backends Need a Database Built for Object Graphs
Mobile screens are object graphs. A social feed shows users, posts, comments, reactions, and timestamps, all nested and interrelated. But the database serving this data thinks in flat rows and joins. The result: mobile API endpoints that issue dozens of queries to assemble a single screen, burning server resources and adding latency over cellular connections.
ormDB is a relational database engine written in Rust that replaces PostgreSQL, MySQL, or SQLite. It is not an ORM. It is the actual database that powers your mobile backend API. You keep your existing ORM and swap the database underneath.
One Round-Trip Per Screen
Mobile users are impatient and mobile networks are unreliable. Every additional API round-trip risks a timeout or a slow render. ormDB’s graph fetches return entire object hierarchies in a single database operation. Your mobile API endpoint makes one database call and returns the complete data structure the mobile client needs to render a screen.
Real-Time Without Draining Batteries
Mobile apps that poll for updates waste battery life and cellular data. ormDB’s change streams push data changes to your backend in real time. Your backend forwards these to mobile clients via WebSocket or server-sent events. The mobile device only wakes when there is actual new data, preserving battery and reducing data usage.
Per-User Data Isolation
Every mobile app needs user-scoped data access. Most backends implement this with application-level query filters that scope every database query to the authenticated user. ormDB’s row-level security enforces this at the database layer. A misconfigured API endpoint cannot accidentally expose another user’s data because the database itself refuses to return it.
Built-In Capabilities for Feature-Rich Mobile Apps
Modern mobile apps need search, location features, and increasingly AI-powered recommendations. ormDB includes full-text search, geo search, and vector search natively. This means your mobile backend does not need to integrate Elasticsearch for search, PostGIS for location queries, or Pinecone for recommendation embeddings. One database handles all of these.
Efficient Wire Protocol for Mobile
ormDB’s zero-copy wire protocol (rkyv) minimizes the data transferred between the database and your backend server. For mobile backends where server response time directly affects user experience, this reduced overhead translates to faster API responses and lower infrastructure costs.
For teams building mobile backends that need fast data loading, real-time updates, and rich feature support, ormDB provides the database-level capabilities that mobile applications demand.
Frequently Asked Questions
How does ormDB improve mobile API performance?
Mobile screens often display complex nested data (user profiles with posts, comments, and reactions). ormDB's graph fetches return this entire hierarchy in a single round-trip, reducing the number of API calls and lowering latency over mobile networks.
Does ormDB support real-time updates for mobile apps?
Yes. ormDB's built-in change streams push data changes to your mobile backend in real time. Your backend relays these to mobile clients via WebSocket or server-sent events, without polling the database.
Can ormDB handle mobile traffic spikes?
ormDB is written in Rust for high performance. Query budgets prevent individual requests from consuming excessive resources during traffic spikes. Specific scaling characteristics should be evaluated for your workload.
How does ormDB compare to Firebase for mobile backends?
Firebase provides client-side real-time sync but lacks relational data modeling. ormDB provides a full relational database with ACID transactions, native relations, graph fetches, and change streams. It serves as the database for your mobile backend API rather than a direct client-side SDK.
Does ormDB work with React Native, Flutter, or native mobile apps?
ormDB is a server-side database engine. It powers your mobile backend API (built with Express, Django, FastAPI, etc.), which your mobile app communicates with over HTTP or WebSocket. It works with any mobile framework.
Is ormDB suitable for mobile app prototypes?
Yes. ormDB is MIT licensed and in Alpha v0.1.0. Its built-in search, real-time, and vector capabilities let mobile teams prototype feature-rich backends without integrating multiple services.
How does ormDB handle per-user data in mobile apps?
ormDB's row-level security enforces per-user data access at the database layer. Each mobile user only sees their own data, enforced by the database engine, not by application-level query filters.