Twitter has updated its own app with some Material Design elements, but if you're looking for a complete experience, Falcon Pro 3 is what you want. It's a full-featured Twitter app built around Material Design guidelines, with great typography, beautiful transitions and animations, and a buttery-fluid user experience. It also has useful features like smart refresh rates based on your usage, granular notification controls, and big, bold inline images in your timeline. Falcon Pro 3 costs $3.99 for one Twitter account, with additional accounts running $1.99 each.