This app was mentioned in 4 comments, with an average of 5.75 upvotes
Yes you're correct here's their website and here's their Android app it has material design and nice animations.
Google's Top 6 apps:
B&H Photo Video Audio Pro for Immersive Imagery
New York Times for Elegant Typography
Pocket for Adaptive Layouts
Pocket Casts for Seamless Browsing
Tumblr for Delightful Animation
Weather Timeline for Crafted Simplicity
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Full list: https://play.google.com/store/apps/collection/promotion_3001769_io_awards
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Also: plug for /r/materialdesign
No B&H love?
The B&H app is the best material design app I have. It's really great.
https://play.google.com/store/apps/details?id=com.bhphoto&hl=en