I had one of these for years. It doesn't work every time (not every time the pressure drops it will start to rain) but it helps you prepare. I also have a baro

I had one of these for years. It doesn't work every time (not every time the pressure drops it will start to rain) but it helps you prepare. I also have a barometer on the Galaxy Note phone. I tried some barometer applications, but I could not find one that doesn't drain the battery even when they are not showing data, so I stopped using them. The idea is great, but the implementation of the applications and phone not so much - especially when you compare it with a solar powered watch.