Cache doesn't claim to be unique in this area, but it's not another monster library that gives you a god's power. It does nothing but caching, but it does it well. It offers a good public API with out-of-box implementations and great customization possibilities. Cache utilizes Codable in Swift 4 to perform serialization. Cache is built based on Chain-of-responsibility pattern, in which there are many processing objects, each knows how to do 1 task and delegates to the next one. But that's just implementation detail. All you need to know is Storage, it saves and loads Codable objects.