External ADS-B receivers report pressure altitude. Because of this, EFB apps need to adjust altitudes for local QNH.
In the past, AvTraffic has always dealt in GNSS altitudes and passed them directly to the EFB app.
In this release, AvTraffic now converts GNSS altitude to pressure altitude before passing it to the EFB app so it ends up being correct.
In order to do this, AvTraffic uses available ADS-B data from from nearby aircraft. You can monitor this on the Status View.