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.
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?
What was the most interesting / surprising / difficult part about making the Watch portion of this app?