I've had several users mention that they believe the Activity Recorder app is responsible for battery drain that they are seeing since installing. In my mind this is not possible; the application would need to be active in some capacity for this to happen. I've audited my code and noticed that I enable sensor and position events in some cases, but do not explicitly disable them on app exit. I've since updated my code to do disable them, but I'm still curious if this could be the source of problems.
I'm guessing that they're both affected by some sort of Bluetooth or WiFi issue, but have no evidence at this point.