RxRealm
RxSwift extension for RealmSwift's types
...With the Realm Swift SDK, you can access objects stored in a local instance of Realm Database. Create a new object as you would instantiate any other object. Then, pass it to Realm Database inside a write transaction. Update objects by updating field values on an instance of the object within a transaction. Register a notification handler on an entire realm, a collection, or an object, and react to changes. Because Realm Database objects are live objects, they're automatically updated when they're modified.