When comparing Noodl vs Principle, the Slant community recommends Principle for most people. In the question“What are the best tools for prototyping mobile interactions/animations?” Principle is ranked 11th while Noodl is ranked 12th. The most important reason people chose Principle is:
You can find videos for the Principle app course [here](https://www.youtube.com/playlist?list=PLWlUJU11tp4deQOnSFNn_ekpS9GA5_7yP).
Ranked in these QuestionsQuestion Ranking
Pro Use external data
You can use REST API to get data to your prototype.
It is a Chrome app and you can test prototypes on any device that supports WebGL or Canvas.
Pro Prototype two-device (master — companion) apps
You can setup communication between two devices.
You can build one interactive component and then reuse it with different input values (like images, txt, width, speed — any value you can imagine).
Pro Comprehensive help & examples
You can find videos for the Principle app course here.
Pro Simple Sketch import
Import Sketch layers easily to animate your designs.
Pro Build iOS transitions & animations easily
All the iOS easing info is built-in.
Con Mac only
Sadly iOS centric.