Just installed it on my iPhone 6.

Why can't I allow WeatherSignal to access location services always?

Settings->WeatherSignal->Privacy->Location Services looks like this: http://i.imgur.com/BeOcOLP.png

when it should look like this: http://i.imgur.com/kAOB53B.png

The option "Always" is missing from WeatherSignal settings.

Because we can't collect pressure readings in the background (apple doesn't allow a background mode for pressure), so it would just be a waste of the user's battery to be constantly taking their location.

Our of curiosity, which Android devices have a barometer? I've seen the API, but never had a device capable of using it.

From https://play.google.com/store/apps/details?id=ca.cumulonimbu...

  "Devices with barometers include:
  Galaxy S3, S4, S5
  Galaxy Nexus
  Galaxy Note, 2, 3
  Nexus 4, 5, 10
  Xoom
  RAZR MAXX HD
  Xiaomi MI-2, MI-3
  Droid Ultra
  Moto X
  HTC One (M8)
  ..and others!"

No way, my old N4 had a barometer? Wish something like that would be more exploited/publicized, I'm a data nerd and would have loved to play with apps which use it. Good to know, the N6 should have one too in this case.

I wonder how the iPhone's barometer accuracy compares to that of an android device?