Realm lets you build apps faster, build apps that are faster and craft previously impossible experiences.
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Realm’s data structures look like the Objects and Arrays of your language, but provide additional features such as: querying, relationships & graphs, thread safety, and more.
Realm is not built on SQLite. Instead, a custom C++ core is used to provide memory-efficient access to your data by using Realm objects, which usually consume less RAM than native objects. The core also provides an optional persistence layer that can automatically save and retrieve your objects from disk.
Realm offers extraordinary performance compared to SQLite and other persistence solutions.
It has been in development since 2011 and powers an app with over 1 million daily active users at a major mobile game company.