The altitude variation is acquired via the internal or external blutooth GPS. As is, the variometer is way less accurate than a conventional one and have around 1 second delay before beeping.

However, it is fully working and could be useful to everyone who doesn’t have a real variometer.

Key features :

* 2 altimeters
* Digital and analog variometer
* Digital ground speed
* Timer
* Adjustable volume level
* Very compact

This program is still in development and is currently being beta tested on nokia E71. More supported phones to come…