How to make Beautiful & Stylish apps like Timely

Solution 1:

They did a presentation in which they explain how they calculate the view colors, the problems they had with that and a few other useful tips. The video for the presentation is available on their YouTube channel

The number morphing is fairly simple and explained in this article and you can find the complete View class from the article here.

From android developer site check Helping you build beautiful, powerful, successful apps it is just cool.

Android Design, an online style guide which lays out the principles, building blocks, and patterns for excellence in Android user interfaces. It seems to be working;

I hope this answers at least one of your questions.