A better mobile database
means better apps.

Loved by developers and more than a billion users,
Realm is faster, easier to use, and (best of all) free.

Java Objective-C React Native Swift Xamarin

Easy

Get set up in minutes, not hours. Even porting a whole app to Realm is faster than just setting up other databases. After that, you'll have a database that works right inside your language, with features like fluent interfaces, field annotations, querying via NSPredicate, the new Objective-C generics, live objects, change events, typed generic collections, error handling, LINQ queries, nullable properties, and more.

Fast

Thanks to its zero-copy design, Realm is much faster than an ORM, and often faster than raw SQLite. So chain queries queries queries queries queries as deep as you like. You won’t even have time to notice how fast they are.

Advanced

All this ease and speed doesn't mean you give up power. Realm has all the features you expect: encryption, change notifications, easy migrations, sane threading, encryption, change notifications, easy migrations, sane threading, encryption, change events, easy migrations, encryption, change notifications, easy migrations, sane threading, encryption, change notifications, easy migrations, sane threading, and more.

class Dog {}

Dog.schema = {
    name: 'Dog',
    properties: {
        name: 'string',
        age: 'int',
    }
};

let realm = new Realm();
realm.write(() => {
    realm.create('Dog', {name: 'Rex', age: 1});
});

let pups = realm.objects('Dog').filtered('age > 2');

@interface Dog : RLMObject
@property NSString *name;
@property NSInteger age;
@end
@implementation Dog
@end

Dog *dog = [Dog new];
dog.name = @"Rex";
dog.age = 1;

RLMRealm *realm = [RLMRealm defaultRealm];
[realm transactionWithBlock:^{
    [realm addObject:dog];
}];

RLMResults<Dog *> *allDogs = [Dog allObjects];
RLMResults<Dog *> *pups = [allDogs objectsWhere:@"age < 2"];

class Dog: Object {
    dynamic var name = ""
    dynamic var age = 0
}

let dog = Dog()
dog.name = "Rex"
dog.age = 1

let realm = try! Realm()
try! realm.write {
    realm.add(dog)
}

let pups = realm.objects(Dog.self).filter("age < 2")

public class Dog extends RealmObject {
    public String name;
    public int age;
}

Dog dog = new Dog();
dog.name = "Rex";
dog.age = 1;

Realm realm = Realm.getDefaultInstance();
realm.beginTransaction();
realm.copyToRealm(dog)
realm.commitTransaction();

RealmResults<Dog> pups = realm.where(Dog.class)
                               .lessThan("age", 2)
                               .findAll();

public class Dog : RealmObject 
{
    public string Name { get; set; }
    public int Age { get; set; }
}

var realm = Realm.GetInstance();
realm.Write(() => 
{
    var mydog = realm.CreateObject<Dog>();
    mydog.Name = "Rex";
    mydog.Age = 1;
});

var pups = realm.All<Dog>().Where(d => d.Age < 2);

Get Started

Realm is developed in the open. Thousands of developers work with us on our products on GitHub, plus hundreds more write add-ons that work with Realm. Our more than 20,000 stars on GitHub speak for themselves.

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Over 1 billion people rely on Realm

Trusted by Fortune 500 mainstays, Global 2000 leaders, and #1-ranked app store successes, Realm is built into apps used by hundreds of millions of people every day.

A better mobile database means better apps.

Loved by developers and more than a billion users, Realm is faster, easier to use, and (best of all) free.