Variometer

4.6
52 reviews
1K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image

About this app

A software variometer. This application uses Kalman filter to estimate climb/descent rate from barometric sensor and accelerometer data. The estimation is displayed on a dial indicator, with optional sound indication. Does not need weather information to work.

Source code is avaliable on GitHub:
https://github.com/igorinov/variometer
Updated on
Aug 1, 2021

Data safety

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No information available
4.6
52 reviews
Garth D. Wiebe
October 16, 2020
The last update causes the app to hang after a half hour to an hour or so. This is on two different devices with two different versions of Android. I wish I had backed up the APK before updating! Now I can't go back. After hanging, we have to close and restart the app. My other criticism is lack of documentation. It is great to be able to adjust the parameters, but they are not intuitively obvious, and I am an engineer!
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Ivan Gorinov
October 18, 2020
Thank you for reporting the problem! The only change in latest update was a bug fix in the smoother, which can be turned off by setting "Smoother lag" to 0. The free book by Roger R. Labbe may help to understand the Kalman filter parameters: https://github.com/rlabbe/Kalman-and-Bayesian-Filters-in-Python. Source code of this app is also on GitHub.
Dave Lindbergh
December 1, 2019
Excellent. In IVSI mode it responds instantly. Have not tried it in flight yet. The "samples" setting is supposed to allow you to trade off response time (lag) vs smoothness, but doesn't seem to do anything at all (at least in IVSI mode). Even so, 5 stars.
1 person found this review helpful
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Ivan Gorinov
August 13, 2020
Thank you for your positive review! Now the smoothing filter is working.
Olivér Erdős
September 4, 2021
Thanks, great work, I easily modified it so now runs in backround, has continuous sink tone and a blueflyvario-like fast beeping light thermal indicator. Now this is the vario of my dreams!
1 person found this review helpful
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