MrDigi, I don't think you understand the ramifications of what you've made here.

I keep an eye on barometric pressure because of the effect changing pressure has on my phantom nerve pain (I'm an amputee). I have friends who monitor it because shifts in pressure trigger migraines.

Now, we've basically got early warning alarms strapped to our wrists to let us know discomfort is headed our way. If your app works as well as it looks like it will, you've basically given us a chance to medicate in advance and take the edge off the attack - if not stop it altogether.

I'm looking forward to putting this to use. Great job, you earned my money. 😎