Name: My Vario
Rating: 4.8 (59 reviews)
Author: YannickD.

[GARMIN DISCLAIMER]
This app is intended only as an in-flight aid and should NOT be used as a primary information source. This app contains a barometric altimeter, as such it will not function in a pressurized aircraft and should NOT be used in a pressurized aircraft.

DESCRIPTION
This free and open-source application provides Variometer functions adapted to non-extreme flight activities such as Sailplanes,.

!!!! This app is NOT for paragliding, it is strictly for NON-EXTREME activities such as sailplanes. Do NOT use this app for extreme flight sports !!!!

My Vario is a BACKUP source of information and should ALWAYS be paired with specialized variometer equipment! Watch sensors are simply not precise enough and THIS APP SHOULD NOT BE USED AS A PRIMARY FLIGHT INSTRUMENT!

USAGE
You really, really want to go through the Manual before first use, and test the application at home! See below USAGE manual.
https://github.com/ydutertre/myvario/blob/main/USAGE

The app is based on the excellent open-source Garmin IQ Sailplane GliderSK application by Cedric Dufour (licensed under GPL v3.0, just like My Vario is), dropping a lot of features for a simpler/leaner experience.

1. Dashboards

Multiple views/dashboards are available.

 - a Global view, displaying all flight data in a single pane: altitude, ground and vertical speeds, finesse, heading, wind direction and speed estimate, if available (wind direction and speed are computed on the fly based on groundspeeds when circling)
 - a Variometer view, where the vertical speed can be visually seen
 - a Varioplot/thermal assistant view, allowing to keep track of your ascent/descent rate along your flight path
 - a Map view (only on supported devices) showing your current location as well as a tracklog (updated every 10 seconds) on a GarminMap
- a Competition View, guiding you to the next waypoint, etc.
 - a Log view, allowing to keep track of your last activities (unavailable during flight) including flight start and end times, maximum and minimum altitudes, etc.

An option to auto-switch to and from the varioplot/thermal assistant view automatically (based on circling auto-detection) is available.

2. Tone and vibration curves

The application makes use of the watch beeps and vibrations (if available).

 -  Variable-frequency tones to "sound" your ascent rate, as well as vibration-based "tones" to fly in silence. These tones follow closely some popular variometer tone curves (sound frequency/pitch, tone to tone or vibration to vibration pause time, tone/vibration length - all depending on vertical speed)
 - a minimum climb rate setting is available, under which sounds or vibrations won't be triggered
 - a sink rate threshold setting is available, for warning of strong sink

3. Live tracking

- Livetracking via Livetrack24, FlySafe, and SportsTrackLive is available, to share your activities with others in real time

4. HUD with ActiveLook

- The App will pair to ActiveLook glasses and stream the following information in real time throughout the flight: Altitude MSL, vertical speed, glide ratio, groundspeed, and heading

5. Under the hood

 - The application uses a Kalman filter for fast and accurate filtering of altitude and vertical speed
 - The smoothing (and latency) applied by the Kalman filter can be changed in the settings
 - The default settings are optimized for a comfortable experience out of the box

NOTES:

I have tested this app extensively in flight to test all of the features. However, please remember that this app is intended only as an in-flight aid and should NOT be used as a primary information source. And should NOT be used in a pressurized aircraft.

!!!! Again, this app is NOT for paragliding, it is strictly for NON-EXTREME activities such as sailplanes. Do NOT use this app for extreme flight sports !!!!