[The Ultimate Guide to UI Animation](https://uxdesign.cc/the-ultimate-guide-to-proper-use-of-animation-in-ux-10bd98614fa9)

https://medium.com/thoughts-on-thoughts/recreating-apple-s-rubber-band-effect-in-swift-dbf981b40f35

https://medium.com/ios-os-x-development/demystifying-uikit-spring-animations-2bb868446773



**Scroll:**

- Animation of inertial movement.
- Animation of bounce to the wall and bounce back
- Function of rubber band drag (pow0.8?)
- Animation of rubber band bouce back


**Card Swipe:**

- Go to next card after swipe pass half way
- Function of sliding to next card (log?)
- Speed threshold of going to next card 
- Function of rubber band drag on the last and first card. (pow0.8)