Thread: Devices to measure barometric pressure

Both my cellphones have free apps that report current barometric pressure. They are good and accurate.
They aren't much good at graphing trends over time.
For a ballistics app you need "Station Pressure" ie the actual pressure at the "weather station" where you are. There's also a corrected pressure which is what it would be at sea level which is what you see on weather maps and is used to predict weather changes.
You're right, air pressure affects trajectory a lot - it is equivalent to ballistic coefficient and it can vary by 15% over normal hunting altitudes in NZ.

To measure wind speed I use the lowest model Kestrel which just has temp and wind. Still fairly expensive. I had a Caldwell which fell apart and was just a waste of money to me. Its just a training tool and you can soon estimate if the wind is closer to 2 or 5 or 10 m/s. Then you get into subtleties of direction and air flow where you can't see it and the meter can't meter it ...