Barometer & Altimeter - Elevation & Weather Forecast app for iPhone and iPad

**This app only works on iPhone6/6+, iPad Air 2 or newer devices, because it needs barometric sensor**

A utility app using barometric sensor in iPhone 6/6+ to provide altimeter & barometer functionality. This app shows relative altimeter & elevation data as professional mountain climbing watches do. Moreover, it allows user to calibrate the altimeter with known elevation or air-pressure information to reduce the error caused by weather conditions.

FEATURES:
-Barometer
-Relative Altimeter
-Predict Elevation
-Calibrate Elevation based on Reference Height or Sea-level Pressure data
-Forecast Weather Condition according to Barometer data