This application works well on HTC Desire... however the bad news is that I have not actually used the speakerphone option all day yet it is being reported to be using 15% of my battery!!! Something is amiss for that kind of power usage... The widget is also poorly shaped it looks awkward and wrong sitting on my home screen. I love the idea but at this stage am not sure I will be keeping the app simply because of the power usage. The display o my phone has only been using 5% of the battery power so something is very very strange. All in all though the idea was brilliant for the application.