gr3p.labs today announces dash.up for Tumblr 1.1, the first major update to its social networking client for iOS devices. With a strong focus on usability and design, the user can navigate clearly and smoothly through all his favorite tumblelogs while he posts pictures and text. Besides improving dash.up’s performance, increasing the application’s support for retina devices and thanks to the user’s feedback, gr3p.labs has already added new functionalities. This app retails for $0.99/£0.69 and you can pick it up here. dash.up is a Tumblr client for iPhone and iPod touch with a strong focus on usability and design. With this application, the user will navigate clearly and smoothly through all…