Why does the Securitas Vision app look identical to TrackTik's Guard Tour app?

I have worked as a security guard before and have used site phones with a dedicated app for patrols. The icons and features in Securitas Vision are pretty much identical to the ones in TrackTik Guard Tour, in my opinion. Did TrackTik create the Vision app for Securitas? Or is there some kind of open-source code or software that both Securitas and TrackTik happened to use?