Vertical Speed Indicator

This application works only with Android devices with integrated barometric sensor and Android version 2.3.3 or higher (i.e. Google Nexus 4, Google Nexus 10, Samsung Galaxy S3). If your device does not have the barometer, Google Play will mark the app as incompatible with your device.

Google Play App page on Google Play

A software variometer.

Variometer screenshot

On this screenshot, the indicated rate of descent is 1.6 m/s.

This application calculates vertical speed estimation using simple linear regression. More details here.

Sample size can be configured in the settings window. Long sample size makes better climb/descent rate estimation from the noisy sensor reading, but causes longer lag. Experiments show that default sample size 128 effectively detects climb/descent rate 0.1 m/s, with about 8 seconds lag on "fast" sensor rate.

Supported speed units:

  • m/s
  • 100 ft/min
  • km/h
  • knots