Question on GPS tracking app for private pilots?

I am writing a fiction short story where a racer is in a long rally but hops on a plane at some point to remeet his car later on. But i recently read the description of a new app that says

" MyTracks (iOS)
The name is similar, but the iOS app "MyTracks" is not the same as the "My Tracks" app for Android. However, its functionality is similar. After loading the app and hitting record, MyTracks records your GPS position, creating a virtual thread to track where you've been on an OpenStreetMap. Photos can even be captured, geotagged, and marked on the map while you're recording. When you're done, the route data can be exported to the MyTracks app for Mac OS X."

All Greek to me, who is still a flip phone guy. What I want to know is, when his route in the car is followed and he dismounts , takes a flight and reunites with the car later, carrying his phone (with this app) the whole way, what will the app show for his route between the two airports? I predict nothing because the airplane wasn't following the roadway. The GPS readout would show there was an interruption, correct?
Thanks for enlightening me...

 

More tricks of the winners, Got this from an article But i don't see how the hunting scope works--how could you look through it if it's on the roof? Or maybe it had a wire running down inside the car where you cauld look at a screen? I have used image stabilizing ninoculars when I was testing a yacht in san Diego. Even though I was on a boat and I was looking at a boat, they "stopped the action". Bad part was they cost $1000, and I almost got run over by an aircraft carrier (aren't they supposed to pass on the right?)

From a newspaper article about the 2019 race: " The team also deployed a laser defuser, which alerts the driver when police use laser guns to register speed. The device scrambles the laser for a couple seconds, which is long enough to slow down, Toman said. A brake light kill switch also helped the team avoid signaling police that they were braking.

Other devices included a radar detector, police scanner, CB radio, several GPS devices and an old-fashioned kitchen timer. That helped cut down on the math of time-zone changes, Toman noted. A hunting scope mounted on the roof helped detect roadside deer and parse heat signatures of police in speed traps.

Their secret weapon, though, were spotters along for the journey in other cars and in the back seat. Chadwick, a college student armed with gyro-stabilized binoculars, was tapped to look for police cars ahead or going the other way."

 

Test Shoot: maybe I should tell the plot of my story in more detail. It's a fictional idea of how a guy cheats on the Cannonball by having an identical car parked in Barstow. He stops in Utah and hops a plane down to Barstow and continues the race in that identical car, that way going about 150 miles in 10 minutes compared to being in the first car. In running marathons there's been several where a competitor drops out, gets in a car driven by a fellow plotter on a neighboring street and speeds a couple miles up , then sneaks back in. I have the culprit caught because his iphone's GPS route following app shows a break in his route that can be explained.