Two Databases, One Seamless Experience
A hybrid data architecture that pairs Firebase's real-time sync with SQLite's on-device reliability, so the app keeps working smoothly even when the network doesn't cooperate.
The Challenge
“Built to work, even when the connection doesn't.”
Solution & Architecture
SQLite as the source of truth on-device
Every screen reads from the local database first, so the UI never waits on the network.
Firebase as the real-time sync layer
Firebase handles live updates, notifications, and syncing data across devices in the background.
Writes go local first, then sync
User actions save to SQLite instantly, then queue for sync to Firebase — so nothing is lost if the connection drops mid-action.
Conflict resolution on reconnect
When connectivity returns, a sync layer reconciles any differences between local and remote data.
Fallback is invisible to the user
Whether online or offline, the experience looks and feels the same — no spinners, no blank screens, no "you're offline" dead ends.
Technologies & Tools Used
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