This altimeter either uses GPS or the built in barometer (if available) to determine your current elevation on earth. While GPS provides the absolute altitude as long as you see the sky it is not very accurate. With the help of the barometer we can calculate the altitude indoors and outdoors with a much higher accuracy. But we need a reference altitude to calibrate the barometer altitude. This calibration will degrade over time as the air pressure changes with the weather.

Features:

- GPS and barometer based altitude

- set a base altitude as starting point and get the altitude difference (e.g for hiking or biking)

- calibrate the barometer altitude (connect the current air pressure to your current altitude)

- calibrate with the help of GPS, the standard sea level air pressure or to any altitude you want

- time difference to the last calibration

- warning when it is time to calibrate

- switch between metric and imperial units

The Android Watch app:

- GPS and barometer based altitude

- set a base altitude as starting point (with a long press) and get the altitude difference (e.g for hiking or biking)

- switch between metric and imperial units

- separate watch app and watchface

- supports the ambient mode

这无论是高度表使用GPS或内置气压计（如果可用），以确定在地球上当前高程。虽然GPS只要你看到天空提供了绝对高度是不是很准确。与气压计的帮助下，我们可以以更高的准确度在室内和室外计算高度。但是，我们需要一个参考高度校准的晴雨表高度。这种校准会随着时间的推移，与天气的空气压力的变化。

特征：

- GPS和基于晴雨表海拔

- 设置一个基地海拔高度为出发点，并获得高度差（例如远足或骑自行车）

- 校准晴雨表高度（当前气压连接到您当前的高度）

- 校准与GPS，标准海平面气压的帮助，或任何你想要的高度

- 时差到最后校准

- 当它是时间校准警告

- 公制和英制单位之间切换

Android的应用程序表：

- GPS和基于晴雨表海拔

- 设置一个基地海拔高度为出发点（带有长按），并获得高度差（例如远足或骑自行车）

- 公制和英制单位之间切换

- 独立的应用程序的手表和表盘

- 支持环境模式