WingTask is a mobile web app usable from any device with a browser
Responsive design changes form and function on the device in use
100% feature parity with Taskwarrior, if you can do it in Taskwarrior, you can do it in WingTask
Offline capable view your tasks when you are offline, edit them as well as create new tasks, when you go back online the changes are synced
Browser app behaves like a native mobile app, you can install it to your Android home screen, it gets faster and more performant the more you use it.