E-book subscription service Oyster has released its platform for Android devices, as well as Kindle Fire and Nook HD e-readers. Typography, layouts, a refreshed color palette and other refinements are included with the release; Oyster’s four themes have been revised alongside the new Wythe theme designed for outdoor reading. Book details now include a “read time” estimation for how long it will take to finish a book, and the color palette becomes complementary to the cover imagery. Editor’s notes for top titles offer between 100 and 300 characters, from publications such as Huffington Post, T…