Yes, there is an android app for the Mobius, but I've not used it.
If he's in a day cab and possibly in a different truck every day it may be easier to just carry an extra, formatted memory card with him.
Having a laptop or other means of saving an important video is kind of important.
Dash cams 'loop' video files, meaning the oldest file is recorded over by the most recent one.
So, if something happens that you need to save the video file, you either need to copy it before it vanishes, use the 'save' functions on the cam, (If it has one) or swap out the memory card with a fresh one. (and not lose it)
I usually don't bother with any 'save' or lock functions of the cams I've used since the buttons can be a pain in the XXX to find, and reach in the distances involved when mounted in a truck, and hit the wrong button and you may have other problems. Another easy thing to do is just disconnect the camera when something important has happened.
I get up to 8 hours of video coverage with the two cams I mentioned and a 64gb card.
You can find dash cams at the various truck stops, but they're not that great, and over-priced for what they are.
A 'capacitor' based dash cam is somewhat preferable for long term use in trucks,
but as a first dash cam, I wouldn't get too worried about that.
The mobius has an add on capacitor available, the A119C comes with one.
If he carries the old laptop with him and is not a total techno klutz, the mobius configuration program is not that difficult, or needs the latest laptop to run.
https://www.novotm.com/camera-software.html
That's an a119 on the left, a mobius on the right. They're not big.
The mobius is about the size of an old matchbox, or tic tac box.
Night vision on the A119 or Mobius is adequate, but most people have unrealistic expectations. The Mobius 'C' version has better night capability than the other versions, but I haven't tried the Mobius 2.
I do have one mobius that has run in a tractor trailer for two years, mostly 24/7 for extended periods.
Mobius C
A119 on a dark, rural road
There are other simple, non capacitor type cams that work OK, and are OK for a first dash cam.
The Ausdom A261, and AD282 are usually on amazon. They both have nice overall video, a screen, and should be under $100. Both use a suction cup, and a normal menu to access settings. The Ad282 will accept a 64gb card.