Cool, although I really wish it was free and with an iAP to unlock it. Or a lite version. I want to give it a go for some days to see if I really use it.
I thought about doing some sort of free version of the app with IAP, but it was very hard to find a way to do it that didn't make the app feel too restricted. I might toy with the idea in the future, are there any good examples that you like?
The hardest part of the watch portion is just the testing and debugging. It takes a long time to install on the device and get a real feel for the speed of the app.
The other hard part is figuring out what feels right on the wrist, that part I'm still figuring out.