Overview
AeroTracks and MobileTracks update in the same way, as they both operate from the core MobileTrack infrastructure.
Open the app store app on your phone or AeroTrack. The AeroTrack will have the Google Play app. On a phone, it will either be Google Play or the Apple Store depending on what you use.
Search "Chronotrack Mobiletrack" in the app store to pull up the app in the list. You will find the Update button there if it needs to be updated. Otherwise the button will read "Open".
Tap the Update button to update your MobileTrack or Aerotrack.