We see your need. Please give us some time as first of all we are aimed to spruce up web app (make it perfect) and only after that switch to mobile applications.
The last also is not easy. There are too many bad trackers and we want to be different.
MikeJonathan Hearn commented
I'm switching from another time tracking app becuase of Everhour's slick mention system and integration with Asana. But, there are a few features I really miss from my previous time tracking app, lack of a good mobile interface being chief among them.
I hope you're able to at least make a mobile-optimized version of the web app soon.