The Call of the Wendigo wrote:

It says the temperature is 24.4 degrees.

My alcoholic thermometer says it's 20 degrees.
My digital one says it's 21.5 degrees.

It says the humidity is 50.5%.

My digital hygrometer says it's 53%.

And I have no way of checking the other things it's showing me.

It's now agreeing with my alcoholic thermometer and is just 2% lower than my digital hygrometer.

It says I'm 32.7 metres above sea level.

I'm fairly certain that I'm not.

It's now crediting me with 48.9% humidity.

It's now crediting me with 43.4%!

I'm not convinced it's as accurate as it could be.

The Call of the Wendigo wrote:

It says I'm 32.7 metres above sea level.

I'm fairly certain that I'm not.

It's now saying I'm 17.4 metres above sea level.

It now says I'm 9.1 metres above sea level.

And it says the humidity is 37.8%.

I shall take it into a different room and see what happens to its readings.

I've taken it into an unheated room, which it's decided is 23.5 degrees.

I have now uninstalled it.

You can check your altitude using the OS map layer on streetmap.co.uk.

The Call of the Wendigo wrote:

I have now uninstalled it.

And I was just about to install it.

I only have an older iPhone, but do newer phones have temperature and humidity sensors these days? Such an app surely wouldn't work without them.

Apparently, they do have them but I don't know if mine does. It's relatively new, having been bought last May/June but it's also at the cheaper end of the spectrum.

"The humidity in your room is currently 100%. You might be about to drown."

The response when you are holding your phone in your sweaty hand.