Product review (2 stars): Not for headache tracking - badgered for a product review!
I bought this for the barometric pressure feature so I could track headaches.  The description says it keeps a history, but doesn't mention that it is a one day history, which doesn't fit my needs.
What I GREATLY DISLIKE is being constantly badgered with email requests from Testco for a product review despite asking them to back off and give me a chance to use it before rating it.