[alarmclock]

Yes, the SleepCycle App does use motion too. In fact, I had that idea before they did, but I didn't want to require the user to put the phone on the bed. That seemed really kludgy to me, so that's why I continued on my original path of embedding the motion sensor in the charging dock. I guess I missed out on like a million dollars from that decision, but you never know, maybe we'll beat that figure with this much more sensible device :).

[alarmclock]

Thanks again for the comments. I guess the other major selling point is that it's a charging dock. My girlfriend loses and breaks the charging cables so often that I almost wanted to switch phones so she couldn't use my charger any more. With this, I have at least one dedicated charger and charging location that she won't take away in a hurry when she's late for work and can't find hers.

[mikeash]

Yeah, if you want a charging dock anyway, this certainly serves a nice dual purpose.

My solution to the cable problem was to buy a couple dozen off eBay for about $.70 each. This solution is not for everybody, of course.

[mikeash]

Putting the phone on the bed is kludgy, I agree. It's also superbly cheap, though. Anyway, thanks for the explanation. I was just wondering if there might be other advantages to this approach I might have missed. I can certainly see a niche for this version and I hope you find success.