Realm Database Mobile
Realm is an embedded mobile database (iOS, Android, React Native) that stores data locally and syncs to MongoDB Cloud. Mobile developers use it for offline-first apps, fast queries, and automatic cloud sync. Learning time: 3–4 months. Salary impact: High; offline-first is critical for mobile. Adjacent: React Native, Mobile Development, MongoDB, SQLite.
What is Realm Database Mobile
Realm is an embedded mobile database for iOS, Android, and React Native that prioritizes offline-first functionality and cloud sync. Unlike REST APIs that require network connectivity, Realm stores data locally on the device and synchronizes to MongoDB Cloud asynchronously. Apps read and write to the local database instantly, giving users a fast, responsive experience whether online or offline. Realm is object-oriented: you define data models in code, and Realm handles persistence, indexing, and ACID transactions automatically. When you enable Realm Sync, changes sync bi-directionally with MongoDB Cloud.
📋 Before you start
💰 Salary by region
| Region | Junior | Mid | Senior |
|---|---|---|---|
| USA | $85k | $140k | $200k |
| UK | $50k | $85k | $130k |
| EU | $55k | $90k | $135k |
| CANADA | $80k | $135k | $195k |
🎓 Certifications
🎯 Careers using Realm Database Mobile
❓ FAQ
Why Realm over SQLite?
Does Realm work offline?
What happens if the device is offline for a week?
Can multiple users collaborate?
Is Realm free?
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