Core Data is a core competency for Apple developers—but it's notoriously complex, confusing, and crash prone. Luckily, much of this is resolved with iOS 10's new Core Data APIs. Everything has improved: syntax, architecture, performance, and support to recall and undo several layers of changes. Even the whole data container has been simplified. It's all built into iOS and macOS, and it's the recommended way for Apple developers to work with any nontrivial data.