 <p>Your best bet is probably <a href="http://www.sqlite.org/" rel="nofollow">SQLite</a>, a database engine. From Apple's <a href="https://developer.apple.com/technologies/ios/data-management.html" rel="nofollow">iOS Data Management</a> page:</p> <blockquote> <p>iOS includes the popular SQLite library, a lightweight yet powerful relational database engine that is easily embedded into an application. Used in countless applications across many platforms, SQLite is considered a de facto industry standard for lightweight embedded SQL database programming. Unlike the object-oriented Core Data framework, SQLite uses a procedural, SQL-focused API to manipulate the data tables directly.</p> </blockquote>