Pop vs Prott: What are the differences?

Developers describe Pop as "The extensible iOS and OS X animation library behind Facebook's Paper". Pop is an extensible animation engine for iOS and OS X. In addition to basic static animations, it supports spring and decay dynamic animations, making it useful for building realistic, physics-based interactions. The API allows quick integration with existing Objective-C codebases and enables the animation of any property on any object. It's a mature and well-tested framework that drives all the animations and transitions in Paper. On the other hand, Prott is detailed as "Capture your idea and make a clickable prototype in seconds. Includes animations, realtime sync, and collaboration". Prott is a new and powerful prototyping tool for designing and developing mobile apps. Through rapid prototyping you can shape your ideas instantly. No matter where you are, you can test your prototypes and share your ideas and comments. Continually improve your design without writing a line of code.

Pop and Prott can be categorized as "Mobile Prototyping & Interaction Design" tools.

Pop is an open source tool with 19.7K GitHub stars and 2.9K GitHub forks. Here's a link to Pop's open source repository on GitHub.