I have been beta testing this app for quite sometime, and have seen significant upgrades in both the user interface and speed of synchornisation. The app is free and so it's a must-have if you work remotely with a team who coordinates via Asana.
To use Asana on the web, you must sign in with a Google account. However, this authentication method is not an option for this third party app, instead you'll have to dig into the settings page of the desktop website and find your API key. Either email it to yourself or put it into OneNote so you can transfer the code to your phone and easily paste it into the login page of the app.