Hello All,
I developed a very simple Apps for Garmin Fenix (5,6) watches. The Apps gives you the altitude, vario/speed, max vario/speed, g and maximum g.
https://apps.garmin.com/en-US/apps/d845c527-7383-4073-93db-2fc1c7ac1bf5.
For better accuracy, the altitude is measured via the barometric sensor, the GPS should be OFF.
You can set a safety altitude where the watch will vibrates and bips. Not too sure it will be loud enough ;)
I was nervous with the refresh time of the alti, but users report good feedback. I am not a developer, so be indulgent.
Also, for the one flying paraglider and doing acro, I also developed an App…
https://apps.garmin.com/en-US/apps/1917603a-662c-4aab-a487-328822c4ad5c.