Can you explain what Realm is and how it is used in mobile applications?

Realm is a mobile database optimized for iOS and Android that allows storing and managing data locally on the device. It operates faster and is easier to use compared to traditional SQLite or Core Data.

Features of Realm:

• Object-oriented data storage — data is stored as objects, simplifying work with them in code.
• Automatic synchronization (in the paid version) between devices.
• Support for reactive programming — you can subscribe to data changes.

Example of using Realm in iOS with Swift:

import RealmSwift

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

let realm = try! Realm()

let myDog = Dog()
myDog.name = "Rex"
myDog.age = 3

try! realm.write {
    realm.add(myDog)
}

Thus, Realm simplifies working with local data in mobile applications.