Best alternative - give it a test – Bar-o-Meter - Altimeter & Barometer Review

I tried four different altimeter apps plus my LAD watch. This one is the most accurate and reliable under the no-stress, low risk conditions for which I tested. And the interface aesthetics are pleasing as well. I like it so much I just bought the no-ad option for a buck. I use a 6+.
Review by Skaneateles on Bar-o-Meter - Altimeter & Barometer.