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Realm

C
C tier on Mobile DatabasesScore 5.9 · #16 of 26
Android app
Yes
Free plan
Yes
Runs on
Android, iOS, Linux, Mac, self-hosted, Windows
realm.github.io
The Realm homepage
Visit site Alternatives

Summary

Realm is ranked #16 of 26 in mobile databases on Everything Xiaomi. It runs on Android, iOS, Linux, macOS, Self-hosted, Windows. There is a free plan.

Realm plans and pricing

All plans
Realm Database (open source) Free Free and open source under Apache License 2.0 mongodb.com · 4 Oct 2026

Compared on mobile databases

Mobile platforms
iOS, Android, Xamarinrealm.github.io
SDK languages
Java, Objective-C, JavaScript, Swift, Xamarinrealm.github.io

Facts

Product
Realm is an object database designed to run directly on phones, tablets, and wearables.github.com · 4 Oct 2026
Use case
Realm provides local data persistence for mobile and edge applications.github.com · 4 Oct 2026
Data model
Realm exposes data as objects that can be queried in code without an ORM.github.com · 4 Oct 2026
Database features
The database supports relationships, generics, and vectorization.github.com · 4 Oct 2026
Offline use
The Realm Platform documentation says apps can work through weak signal, offline, or outage scenarios.realm.netlify.app · 4 Oct 2026
Supported platforms
The JavaScript implementation supports React Native on iOS and Android, plus Node.js and Electron on Windows, macOS, and Linux.github.com · 4 Oct 2026
SDKs
The official documentation lists Java, Swift, Objective-C, JavaScript, and .NET SDKs.realm.netlify.app · 4 Oct 2026
Integrations
Realm's former Device Sync connected data across users, devices, and a backend in real time.github.com · 4 Oct 2026
Security
Realm Swift says data can be encrypted in flight and at rest.github.com · 4 Oct 2026
License
MongoDB said it would offer the renamed Atlas Device SDKs as a free open-source project under Apache License 2.0.mongodb.com · 4 Oct 2026
Deprecation
The Realm JavaScript repository says MongoDB announced deprecation of Atlas Device Sync and Realm SDKs in September 2024.github.com · 4 Oct 2026
Support
The Realm documentation directs users to its forums, Stack Overflow, and GitHub issues for help.realm.netlify.app · 4 Oct 2026
Developer tool
Realm Studio can open and edit local and synced Realms and administer Realm Object Server instances.realm.netlify.app · 4 Oct 2026
Maker
MongoDB acquired Realm and its technology in 2019 and renamed it MongoDB Atlas Device SDKs in 2023.mongodb.com · 4 Oct 2026

Best Realm alternatives

See all 12
Btier Espresso #1 7.5 Android FreeBtier Hive #2 7.5 Android $5/moBtier RxDB #3 7.5 Android $99/moBtier Ditto #4 7.4 Android FreeBtier ObjectBox #5 7.3 Android FreeBtier Firebase Cloud Messaging #6 7.2 Android Free

Where it ranks on Everything Xiaomi

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Sources